@Doc DoctorIt wasn't like Sky didn't know what was going on within the rubber cocoon that had wrapped itself around Gonad. Not only could watch Gonad struggling under the surface of the rubber he could also feel his movements and sense the levels of power that Gonad had within him. It was true that the Barbarian had force in spades, beyond that really, but Sky had planned for the eventuality that he could get stronger. The harsh truth about the situation was that Gonad didn't have tools on hand to get out of the trap that Sky had planned out, meticulously, in the moments that their fight had occupied since its start. Even though he'd feel Gonad stop struggling as much within the trap he didn't think the Barbarian was done. If anything Sky had to commend him on how long he could hold his breath in a complete vacuum. There wasn't any moving fast in the position like this, since both weren't moving from their positions, and lack of oxygen was lack of oxygen.
He'd feel the increase in power as Gonad tapped deep into the reservoirs of his berserker roots and allowed the latent power within him to surge forth and fill his physical vessel to the very brim. It was a power up, giving Gonad more of that untapped physical output that he was soon hell bent on using, but it didn't seem to afford him any additional benefit other than allowing him to use more force. Perhaps it made him more resistant to effects like loss of consciousness and potential death, perhaps it allowed him to fight beyond usual parameters, but in the current situation it wasn't going to be enough. As it was stated before when the bouncy castle deflated and started to wrap around Gonad to trap him it did exactly as described 'wrap'. So him trying to reach for the flap that would have been the entrance would have been almost impossible. Since, at the moment, the entrance was wrapped around him dozens of times in efforts to constrict the much stronger gentleman and prevent him from moving. But this was the glorious thing about this particular trap. Gonad's strength would have to find against itself.
Since the rubber of the bouncy castle had 'wrapped' itself around Gonad that means that any attempt to pull on one section would find resistance in another. If Gonad did manage to find a grip somewhere it meant that when he pulled a different section or multiple would tighten against him and then snap the rubber back into place. So it was Gonad's own strength, along with Sky's machinations, that worked against him. His strength in one area would neutralize his strength in another so that he constantly nullified his own attempts to free himself. But that wasn't the only thing he'd find was troubling. It was also previously mentioned that Sky could move rubber from one area to another, in order to account for Gonad's attempts to burst out by overstretching one portion and make it burst. Essentially moving more material so that it could extend safely without breaking and allowing Gonad to get out. It was that same principle that found itself manipulating the rubber that Gonad tried to grab away from his hand, moving away from his fingers in order to prolong his stay within the trap.
The Fae saw where this was going though. If the berserker could stave off the effects of a vacuum through the use of the power up that he had activated then it was going to take far too long for the trap to effectively put him down. So Sky enacted his back up plan. While Gonad continued to struggle within the rubber, his body more than likely suffering from the effects of lack of oxygen regardless if the man could feel it, he'd summon his spear once again within his left hand and funnel some of the energy he was manipulating into it. It was gripped at about mid shaft with his arm stretched out to its appropriate side, elbow bent and pointed toward the ground with the curled fingers facing the sky. He'd quickly bring the spear up over his shoulder and adjusted his position to a crouching stand. He'd then rocket that Spear forward in a sonic javelin toss that'd cause the houses around him to literally shatter. A vapor ring manifested as the spear immediately hit mach 10, wood splinters from the houses around him flying in all directions as they disintegrated, the spear was on a mission as Gonad fought on the inside of his trap.
Now, what about the spear itself? Sky's strength wasn't enough to throw it at the speeds it reached, that was a manipulation of the spiritual energy. Remember that body blow that Sky had landed on the Barbarian earlier? It was attracted to that point, like a super magnet, accelerating the moment it left Sky's hand. The head of it was blazing with power, the edged focused to such a sharpness that not much could stand within its path. It wasn't even a 100th of a second between the time that Sky through it and the moment it'd hit. Since Gonad was stationary the target was easy to hit. Since it homed in on the point Sky landed the body blow? It was practically guaranteed to strike true. Meaning that Gonad would have a hole blown through him and the rubber that surrounded him, one that was about six inches in diameter, straight through his middle torso. But that wasn't he only effect that he had to worry about. Moving at high speed generated extreme heat, so there was a possibility of being disintegrated through the friction alone as it passed through the body, not to mention the trail of kinetic force that followed it. Something that sky scrapers would have a hard time withstanding.
The spear itself, once it penetrated Gonad and exited his body, disappeared. Sky had taken the blowback of the shock wave generated by the throw of his spear head on and was now a good fifty feet back from his original position, but he was still manipulating the rubber. It had been protected from the heat that the spear generated so it didn't disintegrate. But the force Gonad would feel in full force, it passed through the rubber as if it wasn't there since it and the attack itself had been generated from his own usage of spiritual power. It wasn't dulled in anyway. Sky hoped that getting rail gunned would put the Barbarian down. It wasn't that Sky didn't fight with his weapon from the beginning. He had just been looking for an opportune time to use it. Considering Gonad's mindset, the fact he couldn't sense energy or see it coming, it was almost a sure fire way to close out the fight. Whether Gonad died or not was to be determined, his will would dictated that, Sky just wanted to end this.