A birthday boating excursion through Melbourne's Southbank turned sour after a group of girls were splashed with milk while passing under a bridge. The unknown assailant filmed himself dumping an entire bottle of milk on the four girls, completely soaking their clothing, belongings, and charcuterie board. Video of the aftermath, which has racked up nearly 8 million views on TikTok, has drawn criticism from social media users. "What goes through someone's head to think I'm gonna go buy some milk and ruin someone's day," one user said. "I'm so sorry that happened to you and ruined your afternoon." #Southbank #Melbourne #MelbourneCBD #GoBoat #Boating #Milk #Victoria #10NewsFirst