During the interview about the episode, Jason Segel admitted that he was very nervous being around the supermodels, especially Heidi Klum.
The scene that shows the outside of the gym is the same as the gym in "Friends" season 4 episode 4 "The One With The Ballroom Dancing"
Catchphrase: Barney uses "So just. Okay?" for the first time.
This episode completes Barney's mysterious life incidents after Shannon left him to when he met Ted (1998 to 2001).
The name of the gym is written as "Total RIP Fitness".