[Teuthida]

Originally Posted by Professor S

This game looks rediculously good. Example: FPS Headbutt.

http://xbox360.ign.com/articles/660/660000p1.html

So you would be looking at the ground and position yourself relative to how far you think the top of your head is to the point of headbutt contact? Based on the pics I'd say these would be a lovely bunch of people to sit down for some tea with.