The statue
As they walked through the park, Julia was carrying a small hammer in her bag, while Ewa had her phone in her hand, ready to film. They finally came face to face with the statue that they were planning to destroy. It was actually a small sculpture and the head of the figure had a large nose.
The nose was the butt of the joke, the plan was for Julia to break the nose off and they would all have a laugh about it. When she walked up to the sculpture, she took out her hammer and turned around to see where Ewa was and if she was ready. The time had come.