Portals

I've been watching Morgan Freman "Through the Wormhole" and I've been thinking about portals and wormholes lately. I think in a portal you will stretch, but they are micro so you can't fit through anyway. I learned that you will have to have the right type of gas to make it big enough to fit a spaceship in it, I know don't which kind of gas it is(I'm only eight!). So ummmm where was, I oh yeah, if you you put your finger in there it will stretch your finger to the other end, but if there is a mess up some where in the portal, who knows whats going to happen!