It's not a schtick, Zorn means it. Laughing is not a bad reaction though, there's a great deal of humour in his music, and cartoon music is one of his major inspirations. So, if you find it funny, perhaps it's working. Listen to the whole thing, and it may start to make a great deal more sense to you, as well as the humour you may begin to get the energy, the invention, the audacity, the virtuosity. These are some of the best musicians in the western world, and they choose to play this music, in this way. There's a reason, and satire ain't it...
-- Ian