Push the pot. Move the button. Take the toke. Drop the rake.
Gather up the cards, push the green button on the shuffle machine.
The blue deck rises up out of the machine. I go to insert the red deck, but I can't--there's a card in the way? It's lying, cross-wise, in empty spot where I'm supposed to put the red deck? And it's a RED card???
I guess when I pulled the red deck OUT of the machine at the start of the prior hand, the bottom card fell off, and landed harmlessly atop the blue deck; as the blue cards were pulled through the ringer, this card ended up in a spot the machine would not sense it.
NOW what do I do? Call the floor? Reconstruct the last pot? Give everyone refunds?
I added this lone card back into the red deck. Next hand!
(Don't be alarmed, the rule governing the discovery of a wayward card after a hand is complete is that all bets stand.)