I like tea and drink coffee now and then. It's often too strong or bitter for me. Last week, though, I had the worst cup of my life. My SIL made coffee, I had a few sips... then threw up quite violently. Sure, it tasted terrible... but I'd never had a reaction like that before. Thankfully I was outside, so was able to throw up out of sight, then ditch the rest of it.
I cleaned the coffee maker afterwards, and it was super mouldy. It also looked like she'd added some new grounds to very old ones. They must have stomachs of steel!