Guitar slapping
This performance is from Eric Mongrain from Quebec. This is a sound you've never heard before. This is his own style to say the least. Enjoy the video! He is just an amazing player.
Airtap
There are a few guys teaching the technique on youtube. But, here is some more from Eric.
Alone in the mist
Alone in the mist
Eon's illusion
A Ripple Effect
There is much more if you look around.
He makes me proud to be from Quebec.