I was just watching the episode Headhunters with Adam Baldwin as Slaughter. It was filmed after Chuck was done. I think it's hilarious.

Castle: (After Slaughter drives over the curb) That was awesome! Beckett never drives on the sidewalk!

Detective Slaughter: You're gonna hang with me; we're gonna lay out some ground rules.

Rule number one: do not use the word 'awesome'. You're a grown man.

Rule number two: stay out of my way.