Sentence:  For their wedding day, Mr Koh, who's 33 and works in marketing, arrived at his bride's house for the <WSD>gatecrashing</WSD> ceremony wearing a Darth Vader mask, while his groomsmen were decked out in Jedi robes. 
Meaning of the word marked with <WSD> tags:  Part of a traditional Chinese wedding ceremony in which the groom and his groomsmen complete several difficult or embarrassing tasks prepared by the bridesmaids to prove his love for the bride.