pineapple grenades stick to AI tower roof

[nc0gnet0]

Title pretty much says it all. Get behind AI tower nest, throw grenade in a manor to bounce off roof and into the floor of the nest, and whala, the grenades sticks to the roof, and no damage is done to the AI tower. Can repeat this multiple times. 

Also, the pineapple grenade should have a 4-4.8 sec fuse. We should be able to pull pin, wait a few seconds, and then throw, making the grenade explode much quicker to impact. This is a real thing, historically accurate, and not hard to model.