-Boondoggle, where a switch backside big spin inward heelflip (for lack of an easier name) may be the nuttiest trick. Compared to his later parts, this one is really quite subdued but still tops loads of tech video parts today and includes some pretty cool spots as well.
-Flow Trash (above), CJ's wildest full length part for sure
-Bangin, where it becomes super challenging to even name or decipher the tricks he does
-5-Incher, CJ's insanity starting at 18:06
I'd also like to point out that amidst all of his switch/nollie, double/triple flips, and inward big spinning craziness, CJ's standard tricks are also on point. He's really on a completely different level so I wouldn't be surprised if in 2014 he comes out with his full introductory part to Almost.
And for a nice visual shocker, there's this: