What brewing mistake cooked you early on?

Forgot yeast ended up with vinegar

Boiled hops too long, bitter disaster

Added salt instead of sugar once

Fermented too warm tasted like whiskey

Forgot yeast stayed sweet, never fizzed

Added fruit too early funky aroma

Used old yeast weak fermentation

Trusted kit instructions blindly once

Rushed fermentation green beer taste

Crushed grains wrong, poor efficiency

Measured hops wrong, bitterness spiked