I would go sky diving and shoot two portals at the ground right before I hit [Super jump]. I would a put a portal on a big piece of metal and drop it off of a boat into the Mariana Trench in the ocean. Then I would put one at the center of a desert. Imagine the pressure from the deepest part of the ocean instantly being released through a portal. Shoot a portal at the Moon and wipe out all life on Earth when I make the second portal within the Earths atmosphere which would vent our air into space.
A portal gun could be very dangerous.
I don't think I want you to do that, especially the wipe all life part.
use it to get into frigid chicks panties
I was thinking of the sam... Wait a minute, you stole my idea! Thief!