I found myself laughing out loud through out the episode. In the begining they were wondering what was taking Donnie so long and Mikey mentions his short attention span and says something like 'Oh, gum' and Raph smacks it out of his hand. Why he chose Leo to drive because Raph and Mikey would hit something just because.
Then poor Raph is all out of it. Loved it when Mikey fought off the bad guys while looking after Raph. The shellraiser is awesome.