When one of the performers from street theatre group, Spark!, borrowed Derry woman, Karen Campbell's phone no one could have predicted what happened next.
Karen, like thousands of other Hallowe'en revellers was enjoying the spooky atmosphere in Derry city centre when the street performer decided to borrow her phone.
The performer takes the phone and while it is still recording he videos himself waving into the camera.
The drummer then runs towards the crowd and points the camera at some of the people in the audience.
"The drummer from Spark took my phone - it was absolutely brilliant," said Karen.
Derry's Hallowe'en celebrations will finish on Tuesday evening with a street carnival parade (7pm) and the fireworks finale (8.15pm).