Listen - on the tenth night the peg was pulled out of the hasp on Billy's boxcar...

Listen - on the tenth night the peg was pulled out of the hasp on Billy's boxcar door, and the door was opened. Billy Pilgrim was lying at an angle on the corner-brace, self-crucified, holding himself there with a blue and ivory claw hooked over the sill of the ventilator. Billy coughed when the door was opened, and when he coughed he shit think gruel. This was in accordance with the Third Law of Motion according to Sir Isaac Newton. This law tells us that for every action there is a reaction which is equal and opposite in direction.
This can be useful in rocketry.