We used to have an old rented hall with a platform that I think was 2-3 feet off the ground (maybe it just seemed that high 'cause I was small).
One mid-week service meeting, there was a segment with multiple people on the small stage being interviewed in turn by one of the elders - oldish guy, pretty humpty-dumpty physique. They'd obviously rehearsed it ... somewhere else. Each time the next person was added to the group, they had to shuffle up, and because they were seated, most just sort of "jumped" the chair they were on along. The elder did the same to his, going backwards.
Looking back, the tension was amazing. You could see the leg of that chair getting closer ... and closer ... to the edge of the platform.
Eventually, he went. I still don't know how, I think he was kind of leaning forward to allow the chair to move better (i.e. reducing the weight on it while pushing it back) and he then sat back into it suddenly. Maybe it was "the angels protecting him" (flashbacks, LOL) but he did a complete backflip and landed upright, on the chair, still holding the front of it, now sat at the side of the platform looking up at everyone.
Seriously, it was one of those moments when everyone should have stood up and applauded (did people clap? I can't remember, I think everyone was just in shock) or people should have held up scoring signs like at the olympics.
He just got back on the platform at it carried on. Pretty lucky now I think about it - he was fairly old and it could have been serious 'cause the floors were solid (just lino covering).