While I was in college my partner at the time was a barista and bought a little cold brew kit. So she lets it go overnight on a Friday and gets up to go out on Saturday morning and tells me to try the coffee in the fridge when I get up.
Either she forgot or I was half asleep when she told me but I didn’t know it was concentrated and needed to be cut down before drinking.
So I pour my usual cup with breakfast and thought I was having a heart attack in the shower afterward. 😂