An Alzheimer's patient.
Bill: "Uh, excuse me? Hello."
Dr. Grumpy (looking up): "Yes, I, oh, uh, hi"
Bill: "I know you, um" (he leaned forward, and I realized I had my hospital ID clipped to my shirt) "You look familiar, um Ibee Grumpy?"
Dr. Grumpy: "Yes, Bill, how are you?"
Bill: "Don't tell me, it'll come! I know! You work here!"
Dr. Grumpy: "No, Bill, I'm..."
Bill: "Can you tell me where breakfast cereals are? My wife asked me to get some Corn Flakes."
Dr. Grumpy: "Uh, aisle 16, that way, about halfway down."
Bill: "Thank you."
As he walked away I realized he had a box of Corn Flakes in each hand.