Who's the Daddy!
Double Damage is an `instant effect utility` - this means it is activated as soon as you pick it up.
This one does exactly what it says on the tin, everything takes off twice the amount of energy as it did before and everything that explodes has a larger blast radius.
Check out different combinations of this utility and the various weapons. Weapons with a bit of spread to them are effective, the Cluster Bomb in particular and that bouncing yellow 'Soft Fruit of Doom' can destroy whole halves of landscapes, lethal!