Falling under Hoth
When I was playing online on Hoth (as a Rebel Marksman) I crouched two time between the Ammo Droid and the wall in the Command post in the tunnel, I went a little to the left then I fell under the map until I died. You could see everything, including the room that is blocked by bolders. It worked two times already. As soon as I get the chance I'll post a screenshot of it in this thread.