The LSD screen (aka Limbo) is the standard loading screen. When having difficulties getting past it, it may be due to a server crash. Contact a DEV with another character or post about it on the forums.
Another Limbo screen is being transported out at random while playing, into blank space. Though it looks like you have moved, you are actually at the same place where you are, only, the area failed to load. The common fix is using Spawn Recall. Most likely this is due to a loading failure of the new area.