A woman celebrating the awarding of the Nobel Peace Prize to a Chinese dissident has been charged with assault for accidentally splashing champagne on a security guard outside the Chinese central government’s liaison office in Hong Kong.

“The officer walked up as I was opening a bottle of champagne and he was splashed,” said Ip Ho-yee, 22. “It was a minor incident. I never guessed that opening a bottle of champagne would lead to this.”

Ip, who was arrested Sunday afternoon, made her comments in Cantonese.

The security guard was not injured, but he made a complaint, so Ip was arrested and charged with common assault, said Hong Kong police spokesman Lawrence Li.

“This is an absurd case,” said Law Yuk-kai, director of Human Rights Monitor, a group based in Hong Kong. “This just shows who’s the boss,” Law said, referring to the mainland Chinese government.