"How?", you may ask? Well, my friends, it's quite simple. I do it all the time to cool off hash oil hits and blade hits. All you've got to do is hold a small amount of water or any other liquid (not Draino) look down, and inhale. It will filter the smoke and sound like you're hitting a bong, which, in a technical sense, you are! You can thank me later.
It doesn't filter anything though, because the smoke would sit on top of the liquid since the smoke is already in your mouth. I know you're probably stoned out of your mind so you think it's a great idea, but it's pretty much pointless...
Hold water in your mouth and hit a pipe. It bubbles. Completly pointless and is essentially equal to drinking bong water.
Dropped a handful of K-Pins before I wrote that. They're for pain from the accident. Tried the bong thing many times before, and it does work. So to those of you who doubt me, I have two words for you: Fuck you. That is all, folks.