This is a story that happened waaay back when but I figured I'd share it anyway. So I was doing an alliance roulette with my friend and we got the 3rd NieR raid (The Tower at Paradigm’s Breach). As everyone probably knows, the first boss has this mechanic where he does a knockback and you need to use one of the raised platforms to keep yourself from being blown away like a leaf.
Everything was going smoothly and the boss was almost dead when it was time for that fateful mechanic. I braced myself for it and positioned myself appropriately, making sure I wasn't in the way of the hit by the boss that usually gets a lot of people. Since I was certain I was in a safe zone, I could afford not to pay much attention to what was going on, and the next thing I know, I'm flying off the platform. My brain couldn't comprehend what had happened. Was I by any chance actually in the wrong spot? Did my brain get confused as to which side of the raised platform I should actually stand on? In any case, the boss was dead, so it wasn't a big deal, I guess.
I waited for my corpse to be put back on the platform and to get the standard return message, but once the black screen faded and I was on the platform, I noticed way too many corpses keeping me company. I glanced at my party list to see everyone dead except my friend. Confused, I looked at the other 2 alliances' lists and saw that everyone was dead. By this point, you could probably see the buffering/loading wheel on my head as I tried to process what was going on. It turned out we had killed the boss a tiiiiny bit before the knockback mechanic resolved, and even though he had died, the knockback itself still took place, but all the raised platforms had disappeared, thus blowing everyone off the platform except my friend, who had used Surecast before the mechanic resolved to avoid getting interrupted during their cast. It was such a hilarious thing to see, and we all had a laugh about it as it was probably one of the rarest things/bugs to witness XD