I got to the 2 checkpoints outside the playable area by "lagging" the connection. As long as the door loads and you activate it you're fine. Checkpoints are out of bounds now; 10sec timer that doesn't show up.
Timer is client sided (it will show up even if there's no active connection to master servers) and the client most likely sends an "I'm out of the playable area, please teleport me" -packet to the server.