Of all the days I decide to go make some copies during my lunch period, it just happens to be the day that we have a lockdown at work. For about one hour and 45 minutes!
Luckily the lockdown did not happen while I was teaching ("Mr. Street, I need to go to the bathroom!"). Luckily I wasn't in a gym or caf with hundreds of students. Although I was not in the best place (in my own room), I settled in the staff lounge with three other teachers, a dozen or so students, and a dozen or so adults.
Here's where you can find the article.