Balloon

Balloon is an option in Fleeing the Complex during the "Ghost Inmate" pathway.

After Henry made his way to the security office of The Wall, he has to find a way to descent into an elevator shaft. He succeeds by jumping down, while simultaneously inflating a balloon. Soon, the balloon gets so big it fills up the entire shaft and slows Henry Stickmin down, allowing him to get out of the shaft again. This results in a success.