When playing as the abulance driver, it is possible to phase through walls - heres how its done.
This can be used for a number of ways to minge the server. I showed going through a completely closed off wall - it can be used to get into class specific areas, other people bases, and just out of the map. Disabling the 4th seat for ambos would probably fix this short term.
The First Response Vehicle needs tweaks so you can drive it straight - currently it slides like its on butter, and you end up crashing into everything. Sorry no vid for this