Rebel, did you do something to Rosie's grenades? Almost every time I tried to throw one ahead of me for a few seconds of area denial, or to force an enemy to come back over to me, or over an obstacle ahead of me, they would stop right infront of my face like I threw it against a wall. It even happened when I tried to throw them directly up in the air! I would end up blowing myself up every time I tried to throw it over a box, or the grenade would just fall dumbly behind me while I'm in hot pursuit of a Meower pelting me with knives and soccer balls from just outside my rifle's range. And if I tried to cook the grenade and throw it ahead of me, it would almost always end up blowing up on ME instead because it would lag behind me instead of ahead of me, blowing up right under my feet..