Tumbler Pigeon
I think you might be talking about a backwards roll which is basically a roll from crouching where you lean backwards onto your shoulder and your arms are straightened, and you end up standing.
lay on your back+kick yourself back till your feet touch the ground
jump then as you land jump again then as you land jump again and you should do a somersault
It is one word "backwards" (in reverse).
Sasulate
saltah (סלטה)
three
I believe the word you are looking for is somersault.
The duration of Somersault - film - is 1.77 hours.
The duration of Somersault in a Coffin is 1.77 hours.
No