Because he kept getting nailed to the boards.
Batvirus (stolen joke xD)
Professor: When I reached up to close it after the rain had stopped.
Because someone's always on the deck!
He just started fiddling with it.
A one night stand with Jesus
Pontius Pilates
A painting only need one nail to hang
Get hammered.
He kept on getting nailed into the boards.
Because he doesn't want to be nailed to the boards.
They are the only ones who erase their notebook when the teacher erases the board.
Because every time he tried he got nailed to the boards!