If you turned everything off.... you would have the perfect hover!.
If it were runnning.. tail rotor would not have any effect but torque would so you would spin... unless you had a twin counter rotating main rotor system... then no spin... but your exhaust will be pushing you forward... assuming you have sorted the small problem of no air going in at the sharp end!!
Insurance for EOLs might come down a bit....
Space 1999 was so long ago!!!!!