Usually as part of a mental status exam, I ask patients who the President of the country is. If they don't know that, it's pretty bad. It's kind of annoying when a patient refuses to answer on account of not liking the President.
This was my favorite response to that question:
--Said in 2005. I'll let you figure out who was President at that time.
My second favorite response:
"I'm from Canada."
A guy I worked with said that his two favorite answers were Ringo Starr and Bob Newhart. Not simultaneously, of course.