Fearless Michael Kemeter has completed a perilous 'slack line' walk on Austria's highest mountain.
The line - which was 45 metre long and 2cm wide - was strung up at 3,770 metres at the Pallavicini ridge on the side of Grossglockner mountain.
Although he had a safety rope the melting permafrost in the Alps has made rockfalls and crumbling rock faces an additional hazard - even though the team secured the slackline as best they could.
Slacklining uses nylon strips tensioned between two anchor points and is different from tightrope walking in that the line is not held rigidly taut, but is allowed to move - stretching and bouncing like a long but narrow trampoline.
Kemeter balanced over the 800 metre high ridge without shoes in windy conditions to perform the stunt. He also wore no top to lower wind resistance, to lower his weight and to stop his clothes getting snagged on any of the lines.