Bumposaurus
Okay, an add-on I'd really like to make:
Black-Hole Generator
A medium-sized generator-like weapon that when fired into the air or a wall/floor/etc, creates a black void that sucks in near-by players, bots, and vehicles. It should last about 30 seconds.
When fired into the air, after a short time, it would instantly activate the black-hole.
And like the portal gun, when 1 shot is fired, the other one disappears.