actually for several years I took over walmarts targets and other stores all over the USA. just by calling the store shifting to a department and say something like "Hey this is bill in electronics, is something wrong with the overhead intercom? It won't let me connect" in which the person on the phone would say something like, hold on ill just transfer you over to intercom. and boom. I was live. sometimes I would take it over for the entire night. much lulz was had. I had a burn phone that when it had minutes on it I would give the number out over the intercom, "what you want to hear give the request line a call 212-435-xxxx" which would sometimes result in store workers (managers) calling, and then boom our conversation is now going out over the store intercom. oh that would really get them mad.