Thrillseeker Igor Scotland is relaxing in a hammock on the highline. [Photo/IC]

Thrillseeker Igor Scotland rigged up his highline and secured a red and yellow hammock to it before enjoying some sleep 100 foot above ground. The urban adventurer - who also designs bespoke highwire hammocks - took a nap between the public aquarium in Haus des Meeres Zoo, Vienna, Austria.

Stunned visitors watched as he tiptoed his way across the thin wire before tucking himself into his makeshift bed and napping.