My favorite story like this is from a house right off of I-95 that has a major trunk of underground communication lines right behind the community. Every single house would hear a radio station through their phones, through speakers, through everything. You could walk around the house with your toner wand and clearly listen to the radio.

The worst one was in a house where I was walking between rooms with my phone butt set in my hand. The wires were dangling and definitely not connected to or touching anything at all. The radio station started playing out of the butt set...with nothing connected to it.