I had lunch in a place with curved walls, and the acoustics of the spot where I was sitting were unusual. The conversation from 3 tables away sounded exactly like it was coming from the table next to me. I looked over at the next table and I saw a woman talking but her lips didn't match up with what I was hearing. "The soundtrack is out of sync," I thought. "I hate it when the sountrack is off.". But then I realized that couldn't be right because this was real life and not a show. I briefly wondered if I was having a strange dream. Then I noticed the curved walls and figured out that it was an unusual echo.