Problem is, in that situation, you don't know whether you're being handed over, and probably aren't. The stock ATC answer from the new controller would probably be "Remain clear of controlled airspace, standby."
Happens quite a lot. Sometimes certain LARS controllers have already asked you for information about your proposed onward routing, which leads one to think that a handover is being arranged. Then you get the unwanted call...."Service terminates, Squawk 7000, free call XXXX Radar on frequency XXX.x"
Consider yourself dumped!