Some weapons will do a different attack when pressing the kick button. For example, the plank performs a slightly slower attack that swings down rather than forward, dealing more damage. The pitchfork has a very powerful secondary attack that grabs an enemy and holds them on the end of the pitchfork until your next attack. Since the enemy is doing the flailing animation, where they cannot move until they land on the ground, dropping the weapon off of the edge of a stage will also drop the enemy, still flailing.