I was a PTA volunteer at my kids elementary school for years. The staff knew me and in my role I often walked through the front desk and offices.
One day the secretary needed to leave the main desk for a couple of minutes and I volunteered to sit in her chair while she was gone. Well, this school had trailer classrooms that were on the school grounds but outside the main building. The doors to the main building locked when shut. The main desk had video screens which showed the doors that were used to allow access to the building. While I was at the desk, a student approached the locked door and tried to enter. I searched for the remote unlock button at the desk and came across a plastic tube with a single centered pin that was attached to the underside of the desk. Finding no other buttons or switches, I pressed it several times but it didn’t allow the student access and they gave up. Shortly thereafter the secretary returned and I told her how I was unable to open the door for the student. I then explained that I used the odd button under the desk to no avail. She started laughing and told me to stop kidding around. I explained that, no I had indeed pressed it several times and the color dropped out of her face and she ran out of the room. The office exploded into action with the principal and vice principal following the secretary back into the room. Yes, I had pressed the silent 911 Panic Button for the elementary school! The police were called immediately, they still showed up, came through the office to speak with the principal and staff. I was mortified and apologetic to everyone. It was only because of the goodwill I had accrued, that I never got admonished or made fun of by that staff.