Say someone like Russian Circles or This Will Destro You, just some no-mark boring bearded white guy band. Anyway they play one of their dull, go nowhere songs and then the bassist fucks off and the band just stand around awkwardly for a couple minutes. He comes back onstage and says
“Sorry about that, had to check on my sourdough starter”
So someone from the crowd shouts “Ah, cultivating some yeast are ya?”
And the bassist replies “Yeah”
Then they just go on and play another boring song.