Last night, I went to bed with all the lights off. Obviously. I woke up half an hour after falling asleep, with a jolt. I then saw that the bedside lamp was on.
It's one of those touch lamps where you tap the metal part to turn it on and off. I absolutely, definitely, did not and could not have touched it in my sleep. It's not easy to reach from the bed.
I was a bit freaked out but also I know there must a rational explanation. Can anyone help me? I tried Googling and some people seem to suggest these lights are sensitive and even dust can turn them off. But this has never ever happened before, and I've had this lamp for ten years.
What's going on?