My dad shreds on teles. He's one of the best if not THE best all-around skier I know. He used to throw front/backflips and "helicopters" all of the time and just told me he wants to do at least one more of each before he turns 50 (he's 48).
He can flip off of bridges like no other though. His full arsenal is;
Backie
1 1/2 backie
double backie
frontflip
1/12 frontflip
misty
Gainer
1 1/2 gainer
He's done a double gainer a couple of times.