I think it may be that some people have low environmental-sensation barriers. For them, hearing "bus factor" may make it through the barrier and result in an i

I think it may be that some people have low environmental-sensation barriers. For them, hearing "bus factor" may make it through the barrier and result in an involuntary creation of imagery in their head of someone getting gruesomely hit by a bus, and then the corresponding emotions they would feel (or simply just the emotions, without the imagery).