I know that some admins have been trying to restart the zm server in the event of the gravity breaking via crashing it. They attempt to crash it by setting the gravity to a negative value. This however does not actually crash it but simply lags it into the next dimension and takes all the other servers with it as it opens up a black hole of doom in the memory, until it runs out and then finally crashes after a significant amount of time.
To alleviate this problem and to allow admins to restart the server when needed please use the following command: ma_rcon _restart
The _restart command will crash the server as soon as it is entered. This way it will restart via the auto crash detection immediately. Admins that abuse this power will have rcon powers taken away and or will be perma banned from all servers. The restart command should only be used in a situation where the server physics are broken and map switching nor switching around sv_turbophysics along with other possible cvars does not fix the problem.