its like they impact their own barrels and kill you
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Lukrask, Kell of Pizza
*Your moist order has arrived* - old
Techincal explanation: Projectiles collide on something physical that was in their way, which can be scorn saw-shooting rifles, glimmer, some pieces of enemies like brigs' front panels, ammo crates and even other grenades. Funny explanation: Remember when Bugs Bunny used to shove a finger in Elmer's gun and it went kabblooomm? That's it.