A single projectile is fired, and as it collides with a surface, several projectiles are spawned, which bounce off following the same trajectory as the launched one.
The disks have a small radius of target pursuit.

Fires three discs straight ahead, without bouncing. The discs are fired one after another with a slight delay. These discs fly faster than with the standart shot.
This is a burst-fire mode. Each click of RMB launces three projectiles, holding down RMB produces no effect.