that looks very painful

Depends on how flexible you are.

Still looks painfull.lol

Personally, I would crack like a crushed nut

DAM i did that once when i was wearing sock on a wooden floor....i sliped and did it LOL...it hurts u no wat i mean

It only hurts if you're not used to it, Rei is. Look, she's even got Asuka (I think that's her) pushing her a little for added stretch. She must have worked on that for years.

ouchies

Always remember to strech before and after excercising. Otherwise you'll feel it in the morning. I would know.

As would I. God that hurt SO much when the muscles in my legs retracted... damn...

Be carfull not to over strech that also bad. Onetime I was doing split and pulled a leg muscel. The sound it made scared me so much that I did some kind of funky backflip.