Parked his head and forgot where he left it. Playing Scrabble, but we can't figure out what words he's building. Playing baseball with a rubber bat. Playing hockey with a warped puck. Plays pinochle with a poker deck.
Pressure's up, but there's a slow leak somewhere.
Puts a finger in his ear so the draft through his head isn't annoying. Racing fifty yards with a pregnant woman, he'd come in third. Reads Homer in the original Greek, but doesn't know Greek. Receiver is off the hook. Renewable energy source for hot air balloons.