We have a Dyson floor standing fan in our bedroom which lives against the wall opposite the end of our bed. The fan is operated by a small remote control, and when not in use, it sits on top of the fan with a built in magnet keeping it in place. We've had the fan for about four years, and only use it if there's a heatwave.
My husband and the dog always go to bed really early, and a couple of weeks ago, when I went to bed a couple of hours later, I noticed the fan was on. My husband woke up, and asked if I'd put it on, and I said no, but I'd assumed he had. We switched the fan off thinking it was a bit strange, but didn't really think anything more about it.
Anyway, last night I was watching tv in bed, and husband and dog had got up as he was hungry - they were in the lounge. After I'd been in bed for about an hour watching Aftersun, I suddenly heard the fan come on!