Candle Wax + Water = Fire?

This is for all the pyros out there!
Discovered this fiery lil trick at Paudin's Birthday BBQ. Basically you put an empty tin can on top of your BBQ hot coals, then throw in some candles & let them melt down. You have to wait a while, but eventually it starts to boil ... then you tell everyone to step back & cover their eyebrows, & ask the bravest (or dumbest) person to flick a *few drops* of water into the wax (pouring 1/2 glass of water is pretty insane, I wouldn't recommend it).
This will create massive massive flames, we're talking as high as a house.
So I'm not encouraging anyone to do this ... just letting you know of a nifty lil trick!
p.s. *don't* let Pledgy know about this!