our brains run simulations of awful situations all the time as a diagnostic self-test system. The fact that we recoil in revulsion from destructive intrusive thoughts is a sign that we are still at least nominally sane. Those who yearn for peace prepare for war. Likewise, those who care for their loved ones prepare to face terrible events that might befall them.
Now imagine riding one with your wife and TWO CHILDREN.
NEVER. FUCKING. AGAIN.
(Disclaimer: nothing happened, but the fucking horror and constant stress. That's the kind of shit I have no problem doing by myself or with my wife only.)