My Stepdad did some part time work fitting burglar alarms and security equipment at the weekends. Sometimes he would take me to the job with him, and I would spend hours quite happily footing the ladder for him while he worked high above.
He also made voice recordings for burglar alarms. When a building was being broken into the alarm would dial the Police automatically.
Stepdad would shut the spare room door and put on a serious voice, and then tape himself saying something like “Warning! Intruder at 112 Station Road. Please respond immediately.”
At first everyone thought it very funny when I put my mouth to the bottom of the closed spare room door and emitted a loud raspberry sound at a crucial moment. This soon wore off and I was asked not to make farting noises under the door while dad was recording the Police tapes. This was widened to “All noises,” after I started making a machine gun sound under the door instead.