OK new ones:
Knockbacker:
When you grab this powered, It upgrades your weapon for x seconds. And when you shoot your enemy with it he flies away, Knockbacking him, also it tumbles him, it's like a tranquilizer shotgun.
FlashBoom:
After grabbing this powered, you spawn a white explosion, making all player blind, if they were next to you, after that, they are poisoned, losing -x, for x seconds.