We went on lock down my second semester here. We received a text saying, "Active shooter on campus; shelter in place." I was in accounting that day, and we read the text to the professor, who says, "Well, what do you want me to do about it?" and then tried to continue teaching. Meanwhile, none of us were focused and ended up gathering by the windows watching the police come. We were evacuated by SWAT team. Since I was a commuter and my car was right in the lot, I was able to leave. I got off campus and pulled over. My parents were at O's opening day that day, and I couldn't reach them (it took about four hours to reach them). I called my aunt and started crying. She calmed me down over the phone so I was able to drive home. I called a couple of my relatives, who had likely seen it on the news, my bestie's mother, who had already heard and was texting me, and a leader from my religious group so that everyone knew I was fine, since no one knew what was going on at the time.
We found out later that it was someone shooting a BB gun in the woods. Students who later were expelled.
In the world that we live in, where school shootings are more and more common, you really can't be too careful.