Now let's harken back to some old-school scares. In 2017, researchers claimed to finally solve the mystery of the H.L. Hunley, a hand-cranked submarine used by the Confederate army during the Civil War. Their findings were cool and all, but what really blew us away was the mystery itself: All eight members of the crew died seated at their battle stations. The sub was, for the most part, intact, and there was no sign that they had made any effort to evacuate or pump out water. None of them suffered broken bones. By all appearances, they'd died without a struggle. If the image of eight soldiers sitting stoically in wait of death doesn't wig you out, well, sorry. It's wiggy.