A two stage adrenaline boost when a player scores 2 or 3 kills within 5 seconds (by default), he gets an increase to his health and armor and gets a temporary increase in speed.
This addon lets any player pushing and holding down the jump (space)-key automatically jump as soon as the ground is touched, known as "bunnyhop". In addition, the "use" key can be pressed to add a push to the jump.