And he didn't do too bad, actually.
This comedy show called "The Gateway Show" makes the comics do two sets: one sober, and then another where they are super high after smoking a tonne of weed backstage.
This dude, comedian Mike Masilotti, was worried that - because he's a functional stoner" - he wouldn't be able to get sufficiently high off the devil's lettuce. So he went for a different vegetable, so to speak...
Here's his comedy set of chowing down a whole bunch of shrooms and them kicking in just as he got on stage.