I live next to a large DMV parking lot. It's patrolled by guards, but they can't be everywhere all the time.
This morning, a man apparently lay in wait and surprised his ex. A huge shouting argument erupted, waking me up out of a sound sleep. I was thinking "if someone's gonna get shot, the least I can do is get out of bed." It ended with squealing tires and the man hurling nasty accusations.