Let me tell you, the bottom of that curve is not too far off...
I have been a heavy coffee drinker since 16.
Monday. The day before payday and I couldn't afford coffee, so I dug in for the long haul with a bottle of aspirin and a positive outlook.
Unfortunately I spun off into caffeine withdrawals that would kill a horse.
Seriously. Good thing I'm not a horse...
I went home early, almost threw up on the freeway twice, went to bed at 4:30 in the afternoon with a queasy stomach and a pounding headache.
Woke up at 12:30 with a smaller pounding and a familiar acid taste in my mouth that told me I should eat something even though I didn't want to. Ate half a bowl of Cheerios and settled on to the couch in case I needed to shout for Huey without waking my wife. Two hours later, I ate another half a bowl of Cheerios and felt well enough to go to bed.
From there to the time my alarm clock went off, I had the strangest, most vivid dreams I have had in a long time.
This morning, I am still reeling from the aftereffects, taking it one cup at a time with a resolve to eventually switch to decaf, with rocket fuel reserved for necessary events...