For some reason the final character in that URL has become detached from the hotlink, so to get it to work, the one who clicks it has to add it back onto the end manually. At least that's what happened here. The missing character is a ")".
Interesting about the genetic reason for stress being one man's meat and another man's poison. Yet in my case I don't feel full of dopamine, just a dull, uneasy feeling that feels like more of a psychological than a physical thing. I don't notice any loss of general mental function when I have something that I pretty much have to do on pain of significantly bad consequences, except that I find it very hard to make a start even though I know I'd be a fool to leave it undone. Though I've long hated stress, and tend to arrange my life to avoid it as far as is practicable. Sometimes I kind of lose patience with myself for being so defense-oriented, and then I take on a significant risk, and when I do I tend to feel surprisingly good about it, as if showing signs of confidence makes me feel confident. But that pattern doesn't come to order.