The Jackal grenades need collision checks, so they only actually detonate after they contact a surface (which can be anything; a floor, wall, enemy player/vehicle/gen, etc).Grenades detonated before contacting a surface will simply vaporize for no apparent reason. Url in case anyone else wants a free soldier spinfusor as well. There were well over 4k keys remaining when I redeemed mine just now.Many thanks, I was saving up for one.