I seriously doubt anyone can make a case for any specific incident.
The standard expression where I live is that someone might fall under a bus, meaning they could unexpectedly die or be maimed by some easily-imagined misfortune.
I'm not even familiar with OP's usage implying that the misfortune is a consequence of deliberate malevolence. It's easily understood in the context of the standard expression, but I certainly don't think it's used much.