i was just looking around youtube for a forge glitch, then i came across this. the glitch lets you put a double box around you making a shield, no one can see you because you are inside the double box. but you on the inside, it looks like there is no double box. you can also shoot out of it, but not into it. i hope i explained myself well enough. here is the link to youtube. http://youtube.com/watch?v=7JbU2dwgkwo
lol i found this out for myself about a week ago! all you do is pretty much interlocking objects with yourself.. set place at start-NO respawn-30 secs then stand where the double box is supposed to spawn, and you go inside it. lol EDIT: After watching the video... i see he does it a different way
I accidentally did this by placing a double box on the receiving end of a teleporter and stepping through the sender. It was great.