lol u can do that in almost any lvl if u block off all the other exit points off the mongoose like the walls r doin. if there`s nothin under the floor and u block off the top floor with a crate u can go under the lvl
Well it`s waaay faster than walking through the pipe so there you go. I find it odd that so many people attack this as useless when it clearly isn`t. You move through a solid surface. That`s useful.
For all the people saying this is dumb and useless: passing through the gates of Sidewinder with a ghost, via a very similar trick, was a diabolical strategy for swift flag caps. There could be many, more detrimental, uses of this if applied to different places.