Ab Ripper X, and Whatever I can think of X

My goal is to attain that mythological 6-pack that only a few people can achieve.  To supplement my INSANITY (for fat burning), I've also incorporated the Ab Ripper X routine from P90X, and added a few other abs workouts to make those puppies come out their cave.

I've finally mastered Mason Twist, which is one of the hardest ab exercises to do.

Check it out:

also Hanging Knees raises