Facility from Goldeneye 64. Works over Final Destination by default, but you can try it over other stages like Green Hill, Luigi's Mansion, Skyworld or Bridge of Eldin, WITHOUT needing any rel file. Also, you can place it over Norfair, and you will get a nice invisible lava this way. This is good to emulate a stage full of proximity mines.

Also, there's an alternate version for snapshoters. If you want to make snapshots on Facility instead of playing on it, get this one: http://www.mediafire.com/download.php?xesgt1h1csc17vl