When I was little, I overheard a policeman on a TV show say, "You're under arrest". I thought that meant that the person being arrested was about to go to sleep (rest).
A childhood belief about police

others believed things like this
- I used to believed that when I went to sleep my heart took a rest too, and didn't pump at all while I slept.— Lara
- I thought that a person's motorskills meant how good they were at driving!Anon
- I thought the phrase "At one's disposal" meant you should dispose of the person or thing.— Geirskogul
- I used to believe if I am naughty, a policeman would come get me and throw me to jail!— Melody
- Until I was about 15, I beleived my Father was the person who sang the "Cheers" TV Show Theme Song.— Dustin
- When I was a kid, I thought you could get arrested if you accidently walked into the wrong restroomAnon