When it comes to drinking things fast, there's this technique. It doesn't really have much to do with swallowing, in fact, it's more closely related to inhaling — and it's a similar concept to what those gross people do who swallow air to belch!
Have you ever seen it done in practice?
You're about to!
Check out the video (above) to see a Japanese man drink what's essentially half his body weight in some sort of liquid (that's a cloudy water if it's water) in SECONDS! IN-SANE!!