You see a package on your front porch. You take it inside your house and open it, it was a futuristic gun. You look at the note that came with it

“To whom it may concern, this is a portal gun. To use it, fire a portal on one surface, then fire another portal at another surface. Then walk through the portal to teleport.

Warning: Walking through a portal will result in the user gaining ten pounds.”

What do you do first?