anyways, i'll write it!
everyone's doing win poses after hitting their opponenet and some characters drop dead after hitting the other, and rain just drops dead in front of Kahn, that was funny, rain's like "fuck this shit, i lost!!!"
I've seen this happen on other platforms than the 360. I seen this glitch on my PS2 armageddon prem. pack, and a long time ago on arcade machines, different shit would happen, and it was laughable. a long time ago I remember one where rain just did a win pose and kahn just stood there like wtf?!
as for your question, I wish I knew, but then again, Mortal Kombat is known for being glitchy.