In England, the news often reports that "a man is helping police with their enquiries". I used to believe this meant that some lucky individual was given a notepad and pen, and asked to go round interviewing people about murders and so forth, and got to be a pretend policeman for the day!
A childhood belief about police

others believed things like this
- When I used to see the sign 'police accident' I thought it meant that a police car had crashed.Anon
- I thought the song "Karma Police" was actually saying "call the police" before I learned the title— Alberto Richardson
- I believed that leaves on trees only became individual when you you close to them, and then I got glasses.— nola
- for the longest time every i used to think that Prince's "Raspberry Barret" said "round merry go round"— lin
- I used to believe if I am naughty, a policeman would come get me and throw me to jail!— Melody
- I thought the England was EDGE-land but england was ENG-landAnon