Wow a lot of people like flooding the earth don't they
Shoot it into a black hole (After of course I find one and DON'T get sucked into it) and hold the earth ransom
Cut cars in half by opening a portal, pushing the car half way into it, opening a portal somewhere else then shutting them both off
Really upset my stomach by putting one portal on the floor and one on a wall and then sitting inbetween (being careful I don't get cut in half)
Travel to america, set up a portal to a mates house, go back home and set up an exit one. Keep hush about it and free holidays and days out are mine!
Travel to the hottest country set one up, then to the coldest country set one up and and watch lots of lightning
(Very carefully) "Jump" over long distances
Shoot one on my hand and one on my foot and become fairly confused
Set up some floor fireworks and reinact the scene from Back to the Future