When Scotty the Frat Boy saw it, he said "Sweet. We're getting blueberries!"
I immediately ran down to the break room, where the lab girls were waiting, and said "Great news! Scott thinks the watermelon on that sign is a blueberry."
Poor kid. When he walked into the break room, the girls were all waving slices of watermelon at him and saying things like "Hey Scott, want a blueberry?"
Scott grumbled something and went outside, presumably to think up a retort. After several minutes, he came sauntering in the back door, grabbed a slice of watermelon, and said "Oh Yeah? So how come they're not in a green bowl?"