The FFSI? My first time ever doing ukemi from a technique; it was zenpo-nage tenkan. I ran, grabbed, flew...and completely forgot to roll. Nage was a nidan; I was still going up two matlengths past - absolutely horizontal. I reached apoapsis and managed to say "Oh, crap..." quite calmly before crashing back to Earth - still flat. When 50 yudansha all go "OOOOOO!!" at the same time; you know it's a spectacular screwup!
Ahahahaha, that's great
Yesterday sensei did a technique on my and he didn't do it hard enough and I didn't jump to roll, so I kind of did a handstand before curling up in a ball and falling over. We laughed, but that could have been dangerous for my wrists had I been going faster.