Carved in the Stone

I have two separate thoughts... one is "don't fall backward dude!" the other is just how realistic his buttocks looks, they didn't form it to look like he had a nice rounded behind, its actually more how it would be if he were flexing and clenching as one might do before throwing something, it's not as flattering but more realistic, and I find it an interesting choice by the artist who possibly knew that it would be looked at from below...