Well, I say it's an entirely understandable course of events. She did wave at a man dressed as a Snickers bar - a SNICKERS bar - and if that doesn't deserve a fit of rage, I don't know what does:
A fancy dress party in one of Dublin's best known gay bars took a sinister turn when a woman attacked her ex-girlfriend Adrienne Martin in a row over a dress-up sumo wrestler's suit.
After a year of acrimony following their bad break up, Sandra Talbot (32) assaulted Martin with a bottle hidden under her costume in a fit of rage at the George pub.
A Dublin court heard that Talbot lashed out at Martin in a row that began over the wrestler's suit that Talbot was wearing. The row escalated as the victim waved at a man dressed as a Snickers bar, the court heard.
Irish Central has the story: Link