Douglas Gorenstein/NBC
Christopher Rosen
November 12, 2015 AT 01:16 PM EST

Jimmy Fallon didn’t hurt an appendage during Wednesday’s episode of The Tonight Show Starring Jimmy Fallon, but a tickle in his throat did force the host to make a monologue substitution.

During a run of jokes about the ages of Bernie Sanders and Hillary Clinton (example: “Bernie Sanders is so old, he needs 12 Viagras to go up in the polls”), Fallon bowed out to let Billy Crystal make a couple of cracks about the presidential hopefuls.

“Boy, that Bernie Sanders sure is old,” Crystal joked. “He’s so old, he thinks a trickle-down theory is about him urinating.”

“Hillary is so old, when she hears 2016, she yells, ‘Bingo!'” Crystal added. He later joked that Clinton was so old “she remembers when Jimmy Fallon had hands.”

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Fallon previously had Jay Leno tag in for him during a monologue in October.

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