Now, I don't do a lot of short sets anymore, and I certainly didn't have one locked, loaded and ready to go that night; that said, I'm a comic, and while in comedy there aren't a ton of rules, there are a few that are very important. One applied here...
If someone offers stage time you say yes, then figure it out.
Booker: "Can you do an hour?"
Booker: "Great, see you tonight."
(Booker hangs up, comic vomits, then figures it out)
I watched hitter after hitter go up and destroy - Kilgariff, Maron, Gilmartin, Kashian - and I sat there some and I got up and paced some, and in between watching a (My Favorite) Murderer's Row of the best people in my industry crush it and the start of this video, I fucking figured it out.