I really don't drink that much caffeine, I do enjoy the taste but it does not wake me up when I'm drowsy.
Coffee can wake me up, so I guess a large dose of it? But even that doesn't fuel me for more than an hour.
Caffeine in general, though? It prevents me from going to sleep but doesn't actually wake me up more. Effects of having drunk it a lot since childhood.
I used to drink caffeine all the fucking time but was getting sick of the headaches so one day I said fukkit and quit cold turkey.
Now I can barely handle any caffeine. On the rare occasions when I absolutely HAVE to drink coffee in order to stay awake for some work or while driving, I end up in this really crazy head-space of paranoia. Like I start worrying that I'm going to fall into the sky or spontaneously combust and shit like that.
Caffeine doesn't really have any noticeable effect on me. If I drink gallons of caffeinated beverages before going to bed, I'll stay awake for longer than normal but I don't feel any less tired or more energetic. And one or two cups won't even keep me awake longer than normal.
My sister begged to get to try coffee when she was a child, and when I worked with her at the same shop a few years back she would basically collapse and whine about being tired if she wasn't carrying two cans of red bull ready to chug, on top of the coffee she had for "breakfast" at home, the caffeine bar she had on the ride to work, and the early morning brew at work. She got better after she got pregnant but jesus christ. Compare her to some other gal her age who didn't get into caffeine, put them at physical work, stress their minds a little, see what happens to the one who doesn't get the caffeine she needs so bad. Same thing with nicotine addiction, it's sad to see how this terrible addiction puts people in mental, physical and financial ruin.
Take opium rectally instead. Better for your skin too.
Depends on the format. If we are talking normal then nothing, if we are talking in the version with the prefix Mr. then it's a party!
Fun fact: Studies show that people who drink 5 or more cups of coffee a day are twice as likely, as people who don't drink any coffee, to hallucinate.