My absolute favorite joke of his wasn't even a real joke.

Apparently Mitch was checking into a hotel and the receptionist asked for a credit card. Mitch being the guy he was he didn't have a credit card. So he pulls out a big wad of cash and says "Nah man this will cover it". So the receptionist is like "No sir, I need a credit card". Mitch's reaction was priceless. Apparently he replied "Nah man, this is what the card represents. That would be like if you hired a Frank Sinatra impersonator and the real Frank Sinatra showed up and you were like, 'Nah we're gonna go with the impersonator'"

I forget who told that story but it always makes me laugh hard.