This guy unleashed his anti-mask fury on a poor Smart & Final employee — flipping out like a maniac, but he changed his tune real quick when cops showed up in force.

The maskless man’s meltdown happened in Paso Robles, CA — a normally chill town known for its wineries — and everyone in the store probably needed a drink after witnessing this public freakout.

According to reports … the guy entered without a mask, so the female employee you see in the video gave him one, but he refused to put it on.

When she followed and demanded he wear it — as required by California state order — he decided to make a scene, screaming obscenities at the top of his lungs … RIGHT in her face. Maskless too.

He was a real tough guy … incredibly aggressive, and even lunged toward her — but watch how quickly he piped down in the face of cops.

Settle in, folks. Masks aren’t going away soon, and neither are tools like this, we’ll bet.