Patient in Woodbridge

A patient in Woodbridge is singing on his bed.

At first, he sings lying down with his back on the bed.........
~ and sings and sings and sings ........ then later, he changes
his position with his face down.

The nurse asks him why he turns and sings with his face down.

He says:" R u stupid or what? Side A finished already, now playing Side B mah "