The air squib is not only used to create hits in actors by FX-technicians, but also a number of magicians wanting to snuff out candles as if by magic. Extinguishing candles may be used to demonstrate “magic powers”, but also in spooky seances to “prove spirits are present”. This way, the candle will blow out in an instant at the exact moment needed. We were once asked to rig hundreds of candles to blow out in the film “The Dream Home”.
The process was greatly simplified by using “channel candles” that has channels running the length of the candle.
The puff of air introduced by the air squib in the bottom of the candle holder moves through the candle and snuffs out the flame at the top. As if by magic.
Even if I have rigged and seen this effect numerous times, even a “hardened effects technician” like myself is surprised by the effect.
English 
Spanish