Steamrollers are nice, but I like the form of bongs.

And- We call that a supercharge; I've blacked out from it twice... maybe three times. Anyway, the secret is u will pass out even without weed. Your lungs are smaller when you squat down, so when you stand up ur lungs expand and the oxygen is pulled from ur brain as in a gravity bong.

One of these in the cafeteria could get u young'ns home from school early!