Why is Travis Pastrana able to do a double backflip on a dirt bike and no one else can?

No he failed only travis can and because that's what he worked on constantly all year long no one else did and because hes awesome and slightly crazy enough to actually try and succeed.

Look up Cam sinclair and you'll see that your wrong. Pastrana just has a lot of guts and isnt afraid of crashing. Like last year with his backflip 360 I mean he races rally cars now and he still trys the craziest things on a dirt bike. Hes pushing the sport to become even more amazing

Travis Pastrana is just the Man. He just rides that fine line between sanity and insanity and isn't afraid to just go for it. Setting aside the fact the name Pastrana is very "mainstream" now in the fmx and mx world...he remains one of my favorite riders. No one really compares to Travis! I wish he would teach me to backflip!

because travis is the best in the world..no question plus he practices' all year i mean have u seen his house he has a practice area in his backyard, and its safe to say he is pretty much a tony hawk but on a dirtbike

Didn't another rider pull the double in the X Games this year and win a gold?

I think you will find that Cam Sinclair has done the double backflip on a number of occasions and again since he nearly died attempting it over a year ago.

http://www.metalmulisha.com/blog/2010/04/cam-sincl...