Sam's attention to the two wizards darting trough the sky was ruined when the massive speaker rose up from the ground. He braced for a shock wave of wubs that would make Richter shit his pants when he saw the speakers turned to Maria, and her expression to match.
Without thinking he dropped the spear and charged the stage, jumped, and pounced Maria off the stage just in time to avoid the core of the blast.
While not lethal, the edge of the sonic boom still flung them both across the room. Sam managed to break their fall from the worst damage but the impact with the cold ground still dislocated his shoulder. 

"..."

The sonic clap had left their ears ringing, Sam tried to talk but no-one could hear him. Or anything else for that matter.