Police are hunting a woman who was dressed as the Incredible Hulk when she allegedly attacked another woman outside a restaurant.
The suspect, who had green skin like the cult comic book character, as well as red hair and a white T-shirt, launched the "unprovoked" attack in York, North Yorkshire Police said.
The 17-year-old victim suffered a black eye and bruising to her face.
Pc Cheryl Hunter, of York Safer Neighbourhood Team, urged witnesses to get in touch, and said: "This appears to have been a wholly unprovoked assault.
"Thankfully the injuries were not too severe. However, the outcome could have been far more serious."
The incident occurred just after 3am on Friday April 26, outside a McDonald's restaurant on the city's Blake Street, police said.
The woman dressed as the Incredible Hulk had left the restaurant with a group of other people.
She is believed to be white, aged in her late teens or early 20s, around 5ft 8in and of medium build.