My girlfriend and I were fighting over messages she found suspicious. I tried to take my phone back while she was holding it, and it fell onto the road.
The screen shattered completely. For a moment, both of us stopped arguing and just stared at it.
The repair cost was painful, but the bigger issue was how toxic our fights had become. We ended the relationship soon after. That broken phone was probably the clearest sign that we had stopped knowing how to disagree without destroying things.