Rescue Professor Jones Castle Glitch.
Okay, here's what you have to do. Enter the "Rescue Professor Jones" level in "The Last Crusade," and go to the room with the rotating pictures and rugs. Once you get the box in the far right corner of the room out of the little hidden space move it to the upper level. Then PULL the box into the hole. With luck, you'll walk backwards RIGHT THROUGH THE WALL!!! Then you'll fall through the air. WARNING: don't do this unless you are prepared to lose some studs, (coins,) also, this only happened once for me so it might not happen for you.
Added by: Guest Sep 3rd 2011, ID#16169