It was a guy in alcohol withdrawal (or "DT's" as we say in the medical biz).
Normally I'm used to these guys seeing bugs or animals crawling all over, but today I got something, uh, different.
I went into the patient's room. He was tied down to the bed (they usually are until they start to clear).
He thought he was at a pizza joint!
He offered me pizzas of various types, thick and thin crust, various toppings. As we talked he flirted with an imaginary waitress and spoke to imaginary friends that were going in and out of the restaurant.
He also kept asking if someone would bring him some Parmesan cheese and (of course) another pitcher of beer.