I like the one banging it's head against the wall, but when you get 5 or more in a row, it is a bit annoying. The reason I think is due to the quick animation cylce. So I dumped it into PhotoShop's Animation Wizard and slowed down the recycling.
The original, fast version:
The modified, slow version:
Because I didn't change the name, you may have to refresh your browser to get the new one. There should be a difference.