Contraption: 100 words

“This is not going to work” Hadley insists, eyeing the contraption.
“Dude, it so fucking is” Dean grins, donning his helmet. Sunlight streams in from the broken wall, reflecting off the rails, winking.
“If you die, I’m not responsible. And I’m not telling your family.” Hadley shouts from behind protective glass.
Dean looks back and gives the thumbs-up.
The crash test rig jerks into motion, rapidly accelerating, then slams violently into the end. Hadley stares at the empty chair at the end of the rails, the daylight through the hole in the wall and he begins walking towards it.