Yeah, I tagged/quoted the wrong person, I meant Yami when I asked about the post.
But yeah...what do I think happened? I had no idea. It could have been a portal to the shadow realm, it could have been a sinkhole to the dark depths of an abyss the denizens of which are so horrible none can fathom...you get the idea. Now I know it is basically just a shadowhole. Which...kinda has me confuzzeled as to how to deal with it.
And what Doc says is right. A hot object among hot objects will still be visible as another hot object. You would have to be right up against a hot object...and at the SAME ambient temperature...in order to fool your average heat-seeking monster. So, if you set yourself on fire and hid inside another fire, that might work...not to mention, there is the pattern of a person, like how if you see a white piece of paper with a lot of black lines all over it, but also the black line silhouette of a person in it, you can still tell that the person lines are there, and what they are, despite a number of distraction lines.