Activating this trainer

If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options

# Player 
     NumPad1: Low Gravity
     NumPad2: Super Sprinting Speed
     NumPad3: Super Jump

Notes

Low Gravity:
While active you can jump higher and fall slower. You can customize the value after trainer activation. The closer the value is to zero, the less gravity you have.