It makes sense, really, as y'know, he is a comedian an all.
Rogan was commentating on Sunday morning for the main event between Rousey and Holm in front of a record crowd in Melbourne, Australia, when the latter put a hurting on the former for just over 6 minutes, before then knocking her out with a head kick.
Rogan's reaction, filmed cage-side, is pretty much how everyone in the world reacted.