Some people like to live on the edge, but daredevil Flaviu Cernescu prefers to unicycle on the edge.
The video shows Cernescu riding his unicycle the chimney's rim, as well as performing various circus tricks such as balancing on pieces of wood and juggling oranges.
He also shows how scary the climb down can be as he slowly maneuvers through bent metal railings, crumbling stone walls and the kind of rickety ladder not even Indiana Jones would trust.
Much of the footage is from Cernescu's point of view so we can all pretend we're the adrenaline junkie doing death-defying stunts when we're really safely at home watching from our comfy chairs.
For those who want to see even more frightening feats in unicycling, Cernescu's YouTube channel is full of videos featuring his crazy stunts on top of the world's tallest abandoned structures.