I can't remember the last time I actually fell out of a chair O_o If I lose balance(ice as an example) then I usually maintain and catch myself before anything bad happens. I love to use ice and slush and stuff to glide along and I love leaning in chairs and what have you. I guess due to that and my quick movement that I have developed a good measure of balance.

I am probably one of the only people who you would see dart around through people, under rails, over rails, spinning and sliding in business clothing down town on a day to day basis XD