This map is the actual map that is saved as meep77777's "huge roller coaster". The map they have uploaded is in fact a version of Luigi's Mansion that has been filled with TNT, while the player is in creative mode. There is absolutely no roller coaster, and I don't know why this map was saved as a roller coaster when there is no roller coaster to be found.

The original upload by meep77777 can be found here.