Super Jump
From Fortress Blast

Super Jump is the fourth powerup in Fortress Blast. It launches the user high into the air, allowing players to simulate a rocket or sticky jump without using ammo, or to reach areas normally inaccessible to them. Jumping before using this powerup will cause the height gained to be greater, and a similar case if falling. If Mega Mann is active, Super Jump is only half as effective.
Development information
The player's velocity is increased by (not set to) 800 HU/s. If they are using Mega Mann at the time, this value is instead 400 HU/s. Super Jump is also one of the few powerups that does not require a callback.