I had two great-aunts (both now deceased) who would usually talk on the phone once a week. Either A would call B, or vice versa, about the same time on the same day every week. One day A picked up the phone, dialed B's number, and waited for it to ring. It didn't, there was just silence. A mumbled to herself, "Well, this is odd, I wonder why it isn't ringing," and then heard B's voice saying, "A? Is that you?" B had picked up her phone to dial A just as A was dialing B, so that they were connected without the phone ever ringing.