backflip
I found the best way to do it with my maxx is
1st have the right jump somethin you really have to correct off when your in the air.
2nd hit it hard and fast don't let off until your truck is at or passed 90 degrees and let off the gas all together.
3rd hope you got lots of air to correct for the landing, correct as needed.
4th Im wasting all my time writing this becuase trial and error is very best advice how can anyone tell ya how its a split second reaction. I would bet that most people who've done them didn't try the first one it just happened. Like it did to me and i was hocked until i landed it clean. Just go out and jump dont let off the gas and see what works for you. Have some extra bucks, I broke aluminum shock towers when i learned.