But the scariest part of this story isn't the holes, it's the irresistible urge to go in..

I think this one rings true to a lot of people who struggle with intrusive thoughts. It’s not about logic, it’s about that weird urge to do the worst possible thing. You get the urge to climb in because it’s scary. So scary you can’t focus on anything else. But maybe if you just did it, at least you could stop worrying about it.

They... they don't jump in though. They press themselves into their hole slowly, and continue to press themselves deeper in, so slowly that they are physically pressed and molded into something monstrous.

Like... yeah, mass hysteria doesn't work exactly like that, but it's fiction? It in no way resembles something that could take place in real life. The fear comes from putting yourself into the headspace of everyone around you seeming to lose control of themselves, and then the same thing happening to you, but you don't seem to care, you just slowly begin to yearn desperately for the tight pressure of the hole that fits you perfectly.

If you like it, I highly recommend all his manga. They're all just as creepy/terrifying as this one.