gravity bongs are crazy

[imitator]

So how do ya hit a waterfall bong? I understand letting the water out the bottom pulls air and smoke in through the top. So once full, do you just unscrew the top and hit it like a non-water pipe?

Yep yep. You just take the top off, and suck the smoke.

I like to put my finger on the carb and build up some suction power so it shotguns in...