What looked like a receipt printer was in fact printing the text of a choose-your-own adventure, and the thing that looked like a calculator was actually the number pad into which you key your choices. Written in marker on the lid after the fashion of Calvin and Hobbes was the name "The Choosatron". It was Jerry's own invention and you can out more about it here. He was not short of drinks that night.
"You Are A Shark"...?!