phanna, in ur video the third mario trips first and then the second trips, then the third trips again. it MIGHT BE (don't kill me, i personally think tripping is random, but i don't want to say there aren't any chances that it's not totally random), that, how you stated in the post above, no two people trip simultaneously. I remember a video where 3 sheiks/zeldas transformed (simultaneously, with the wavebird method), BUT the transformations DID NOT finish the same time. The first character slot finished first, then the second slot, then the third. MAYBE the game can't handle two people tripping the same time too, and therefore, if 2 people would trip simultaneously, only one will trip. This could mean the third slot trips first, because the game handles the third slot with the biggest disadvantage (like in the transformation video). Now why did then the second mario trip the second time and not the third one? Because the third one was still in some getting up animation. I know, this sounds silly, but phanna, could you test tripping with 3 marios and one wavebird a bit more? Maybe get a video where the first slot mario trips und not the third, or 2 marios trip exactly the same time. This would finally statisfy all the people who think tripping is NOT random.
PS: sorry if my english is bad, i hope you can understand what i want to say.
EDIT: I just see that you were the guy with the transition/transform video^^
Ok, it would be really cool if you would test the randomness of tripping a bit more, i really hope you do it.