Never done it, always too scared for my teeth, but I always think it looks hella cool and retarded at the same time.
I remember this (Dutch) beer commercial that showed a skeleton with it's front teeth all messed up or someting. And the archeologist is wondering what could cause that so he and this other guy decide to take a beer and the guy opens it with his teeth... eureka moment.
Pretty cool commercial, also made sure I never want to try to open a beerbottle with my teeth.
