LONDON -- You don't want to get on the wrong side of an angry goat. Just don't do it.

The quiet town of Carrickfergus, Northern Ireland recently found this out first-hand when a runaway billy goat stormed the carpark of a local store.

"I was on my own in the store at around 6:20am and thought it was the bread man knocking," manager Jonathan Smyth told the Carrick Times.

"I looked up and there was a massive goat two foot up the door."

Smyth captured the goat's blatant attempt at intimidation on his phone.

Fortunately the enraged beast didn't manage to gain access to the store, but Smyth recounted how it charged one of his customers and forced a member of staff to take shelter in a car.

"We have a pensioner named Billy who shops here and it charged at him and I grabbed him and dragged him through the door just in time before the goat crashed into the door," Smyth said.

A short while later, a member of staff had to take refuge from the goat in a car.

Finally, someone came to claim the goat and its brief reign of terror was put to an end.

Not that Smyth seemed too perturbed by the whole thing.

"It was great," he said. "It made my day."