[Admins]

I made bridges where you can walk under
and above perfectly (using dontblock/blockagain
/drawunderplayer/drawoverplayer) like 2 1/2 years
ago in a level set never uploaded
(hmmm may be I could use it in Graal2001?)

The only problem is that its buggy in online mode:
other players walking under the bridge while
you are standing on it will appear on the bridge
too,
and when you are walking under the bridge then
other players will appear under it too, no matter
if they are under it or above it.
That is just because there are no real layers yet.