This video brings new meaning to the term 'don't try this at home'

This is what happened when Flaviu Cernescu free-climbed a 280m high abandoned chimney in Romania - with no harness.

The 32-year-old filmed his climb up the structure in Pitesti, including this heart-in-mouth moment where he walked across a rust rail on the top of the building, which he say is the second tallest structure in Romania.

"Walking the crane railing at the very top was really intense but I felt good and in control. The wind was a little strong and chilly but still manageable", he said.

Do not try this at home.

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