Here's a suggestion if your looking to get completely blasted--

If your smoking out of a bong, draw the smoke and clear it with one shot. While it's not as much smoke as two separate hits (The draw, breathe, the clear) it's more smoke at once which will knock you off your ass after a few hits.

A while back, I was hitting a 4' bong and didn't choke or cough because I drew, exhaled and cleared. Then recently I hit my friend's standard 1 footer, drew and cleared at once-- two hits and i was absolutely retarded.