A movie that splits a beer bottle in a moment with water and air

It is a movie introducing a method of splitting beer bottles in a moment with water and air.

Despite being just using a little technique, it is quite amazing as it breaks gaudy. But do not try to manage good kids because you should injure with scattered debris.

Details are as follows.
This is a movie actually breaking a beer bottle with water and air.
YouTube - Beer Bottle Breaking Tutorial


Apparently, it seems that the bottle bursts by brewing water into the beer bottle to such an extent that there is some space for air to enter, then quickly applying the palm to the spout and sending the compressed air into the bottle.

It seems to be easy to practice, but it is dangerous if fragments splash vigorously, so good kids must not do money.