Exosuit (District 9, 2009)
What's better than a mecha? A mecha with a gravity gun. Likely inspired by the gravity gun of the Half Life series, the gravity gun attached to this alien combat suit in District 9 packs a mighty punch, flinging nearby objects and debris towards foes at bone crushing velocities. So naturally, our hero Wikus uses it to weaponise a pig. Was there nothing more suitable to chuck at his assailants?