Young was apparently a little unhappy with the terrible-tasting space food that astronauts received. Once in orbit, Young pulled out a mysterious object he had snuck aboard, leading to this exchange with his co-pilot Gus Grissom:
Grissom: What is it?
Young: Corn beef sandwich
Grissom: Where did that come from?
Young: I brought it with me. Let’s see how it tastes. Smells, doesn’t it?