3 ms·https://en.wikipedia.org/wiki/Euthanasia_Coaster https://en.wikipedia.org/wiki/Euthanasia_Coasterby bdamm 11y agohttps://en.wikipedia.org/wiki/Euthanasia_Coaster https://en.wikipedia.org/wiki/Euthanasia_Coastercomrh 11y agoI remember messing up my math in high school physics and accidentally designing one of these of my own.sosuke 11y agoI was surprised that I had a physical queasy reaction to reading that.