We were making rockets for some stupid class in high school.
I decided to firmly attach my nose cone on in such a manner that the parachute would not release when it fell. I also decided not to, in any manner, secure the thruster in place where it belongs, at the bottom of the rocket. So, it proceeded to shoot upwards while the tube-part of the rocket stayed in place, lighting the bottom half on fire, until it hit the immobile nose cone, & the entire thing spiraled horizontally (on fire) towards my teacher.
Funniest thing is that he had already told us "any rocket that lifts off the ground gets 100%" hahahuhaohaha