This glitch allows the player to gain a small amount of height when used back to back it can be used to fly.

Steps
-Look straight down
-Hold space
-Throw your wrench

Doing this will deplete your time meter but even if you spam it regenerates at a rate that you still gain height slowly. It is better to not spam it and make sure your time meter is close to full in case you need to gain height quickly in a short amount of time.