Does Rob Lowe Know John Stamos?

In Parks and Rec season 5 blooper reel, Rob Lowe's character, Chris, said that he was going to dress as his worst fear in their Halloween party. It went something like this:

Chris (Rob Lowe): I will, however, will be dressed as my greatest fear.

Andy (Chris Pratt): What is your greatest fear that you're going to be dressed as?

Chris: Actually, I'm going as John Stamos. (laughter) It's taken me so many seasons to do it!!!