Because they can't hold it for the next person.
A Chipmonk.
A person who stays up all night wondering if there is a dog!
Because they are held together by weak van den Gaal's forces.
Just one. He holds the bulb and the room spins.
One. They stick the bulb in the socket and wait for the world to revolve around them!
One. He holds it up and the world revolves around him.
From Jason's Doner Van. (Sorry, I'm guessing this one's only for the Aussies and Brits)