Awesome, it's Gabe Newell! (Portal 2 spoiler: He doesn't say Gaben in the commentary it's G-a-b-e-n (as in spelling it out) Valve was most likely tired of the Gaben jokes) Anyway here are generic Gabe newell Jokes:
1. " After 10000 years in development hopefully it will have been worth the weight" 2. "A Fat Joke a day keeps the Episode 3 away" 3. "Uh nope, it's just me, Gabe Newell"