Holy christ, you all need to chill out. By the way, I have never played CS in my entire life. Also, I am sure some of us have called a grenade a "nade" and other stupid things like that.
Back on topic, could it be that the recoil pushed him off balance? Maybe that is why he is on one leg?
I play CS (when I'm really bored and the MxO servers are down) and the
Desert Eagle happens to be one of my favorite guns, and I
still don't call it a "deagle". And my guess was also that the recoil pushed him off balance, hence the stupid pose.