Backflips on the ground

well make sure you have good form. jump straight up. if you do a good back flip you should land in the same spot you jumped. jump straight up and keep your head straight on your neck and focus your eyes on something in front of you for as long as you can so its kinda like your putting your head forward. thatll make you spin faster. then as you come around spot your landing and blam! back flip. also when you jump use your whole body arms legs core everything to jumping as high as you can. so as you jump throw your hands up then tuck your legs to your chest. kind of like youre trying to bring your knees to your hands that are above you head. and when your legs are tucked bring your arms down and grab your knees. i think that about covers it. good luck. you may want a spotter for the first few times or you may wanna try them off of things so you get a bit of confidence up.

heres a video that might help
http://youtube.com/watch?v=vcAxRVqzdSc

definitley get someone to spot you like he said

I just recently learned them on the ground and this is the technique I used.  The first thing you want to do to gain confidence is to backflip off the frame of your trampoline onto the mat.  That way you have a pretty sturdy surface and a pretty forgiving landing, and its a level surface (starting surface and landing surface are the same height which would be a good simulation of the ground).  Once you get those on lockdown and you are comfortable with throwing a backflip off a hard surface, take it to a rock ledge or something about 2 feet high with a soft grassy landing.  This will help you gain more confidence with throwing it off a solid surface and landing on a solid surface.  Keep doing this and work your height of the ledge lower and lower.  Once you feel super confident off lets say a 6 inch ledge, go for it on the ground.   Your confidence will be extremely high, and so will your success rate of getting it around and not getting hurt.  Hope that helped!

BcL that's good advice and all but one problem, when I do my backflips, I generally land in the same spot I jump, like when doing no bouncers.  So I was thinking that if I went from frame to tramp, I would land on the frame or even on the ground, because sometimes i land forward a bit.  I think I'm just gonna wing it and have a friend push a matress under me really quick or something like that.

practice them onto a mattress or something first.
even if you are doing no-bounce backflips on your trampoline, you're still actually getting a bit of extra spring from the trampoline. thats just how theyre designed.

Yeah.. I go about 2 feet back on mine.  I think its easier to go backwards than to stay in the same spot.  Well just a little backwards, not too much or else you have less time to pull the flip around.  Just try going back a foot or two, you never know, might work out better for you anyway?

They're not hard. Just make sure you try to jump up, not back.