hey, my shoes are talking

Uh oh: three+ cups of coffee a day increases the risk of hallucinations. Also:

In moderation, caffeine can increase the capacity for mental or physical labor, but when used in excess, it also can be intoxicating, causing nervousness, irritability, anxiety, muscle twitching, insomnia, headaches and heart palpitations, other studies have shown.

I wonder what my customary 4+ cups does…