The chart is wrong on a couple things. Honestly, I'd argue this post should be removed or edited with the correct numbers.

Almost as much caffeine in hot chocolate as in expresso? This chart doesn't look plausible.

Also, it feels odd to compare them all by concentration. Red Bulls come in a specific size.

Also what roast of coffee? How long of a brew? How hot was the brewing water? What elevation did the beans grow? Way too many variables with coffee (and tea for that matter) to be this general

I assume they were all smoking nonstop as well, I’m surprised he even made it to 60

Sleep deprivation will scramble your brain.

After three days I got vivid hallucinations while driving. Traffic was coming straight for me on my side of a divided highway. Never again.

Longest I've stayed up is a 3 and bit days. I didn't hallucinate, because I wasn't drinking caffeine (you can stay surprisingly alert and mellow on just fruit), but I definitely had massive lapses in judgement when crossing the road

Could be Theobromine?

I tried decaf Coke Zero and I have to admit it makes me miserable. Can't work out if it's my head expecting the caffein high and not recieving it, or if it's something in the chemicals itself that acts as a depressant

It's a chemical, so what's the difference? Anyway, yeah, people vastly underestimate how many calories they're drinking.

Same, 2 coffees before 10am and then if I really neee one, a final coffee before midday. Anything beyond that time, forget sleeping

Did it help you math better, or were the doodles largely untethered to reality

Yep, sounds about right. One of the reasons I can't work on a laptop in a coffee shop (other than the maddening music on a loop you can't faze out) for long is just the creep of the caffeinated treadmill

Googling around and one oz (=1 shot as far as I can tell) of espresso seems more like 60mg caffeine.

I'm a little skeptical of the number in the graphic, especially since I don't see a source.

They're probably using "cup" in the container sense, not the measurement sense. So it's shot of espresso vs mug of coffee.

Espresso is smaller and these are absolute amounts, if they were percentages I'm sure the espresso would be higher.

The liquid you drink with filtered coffee has had much more time to steep in all the caffeine from the crushed beans compared to the espresso machine where the liquid travels though the crushed beans under high pressure. This graph might also consider size, but an americano is usually a double espresso with more water so i think they are refering to the brewing method and not the size.