I dont Understand

This guy is he just tapping extremely fast or something I dont know how he does this and how do you practice tapping that fast because it looks like that is what he is doing he went to CrossfireStars with EP.Cherry so someone please tell me if he is tapping extremely fast or what is going on and let me know how in the world would you practice this ty.
http://www.youtube.com/watch?v=zD5z8HstPhI&feature=c4-overview&list=UUBjmlo5Dq47HKawp_uwg4XQ

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