How are you personally affected by caffeine?

So last night I drank about six cups of coffee in a three-hour stretch. I was working on something I really enjoyed, but I noticed that after finishing off the whole pot I’d brewed, reality seemed very static. It was as if time had stopped, as if 7pm (the time I started drinking coffee) felt like 7pm until I totally crashed from my high at around 4am.

Some of my friends have told me some different effects they’ve had, and I was curious to know any of yours.