This is a great picture of my fav pose the girl balancing in bow pose with her stomach on backbenders stomach...what do you think? Have you done that too?

No...but thats an awesome pose, requires alot of balance and control...even my adv students probably wouldnt be able to do it...and theyre good, I think acro improves as you get older, and truly most acrobats arent in their prime until mid to early 30's! As well as physical control, you need mind control.

Wow. I would love to be able to do just either of those seperately on the ground. My doesn't arch nearly that much!

That is an amazing photo I must say. Some people do that at my dance studio and it always looked so easy but it was very hard...