Google search throws you a nice effect when you try searching "Do a Barrel Roll."
Should not it be "Does a Barrel Roll," assuming it's one Barrel (or barrel), or at least "Do a Barrels Roll"? (I assume it should be a question: "Does a barrel roll?" or "Do a barrels roll?")
EDIT: The problem is that I didn't know that "Do a barrel roll" wasn't a question. (Yes, it hadn't a question mark, but I felt that there was an historic reason not to add it.)