Another no no is leaving it out there. Unless in the rare case you are good enough to use it while its out there; turn that arm to face and block a counter you've called into play and then counter that. Or you have the aerial arm out there if they move or try to slip it,lower yourself behind it for disruption and search for them with it for cover or re gauging distance. Always some moment in time if you are switched on where you can bend any rules into advantage.