A shot is fired like normal. When it hits the ground, it rises straight up into the air and proceeds to rain down a barrage of tiny fireball-like projectiles. The projectiles do not leave fire and explode upon impact.
Similar to Fury, but adds an extra "fury projectile" that's blue, rises higher and also drops larger pellets below where it rises. However, it doesn't last as long as the other projectile does.
This weapon activates when it hits the ground, not a tank, friend or foe. Be aware of this so that your shot does not travel through a tank and land in an unintended place.