For god's sake, call a doctor
What if you shot a gun facing straight into a portal facing another portal
Do it, take pictures.
What would happen if you put a portal on one wall, another portal on a moving wall, and then pushed the wall so the 2 portals are touching? Would the space of the portal be like an infinite hall or would it be like a solid wall?
I want one.
The thing on Chell's feet aren't for protection, they're valve's reason for disabling fall damage.
When you put a portal inside a portal...it makes a mirror. How boring.
Your arm goes to one universe, your ass goes to another.
They could use portals to cut steel rods 'n crap.
Did you seriously just find a three year old thread and bump it