In which sport did Georg Hackl often named as the 'Speeding Weißwurst' become famous?

Luge is nerve wracking as they're traveling around 80 mph with no protection. Same with skeleton and downhill skiing. Yikes!

Player #73268714, it is downright foolish and selfish to take part in something like this. Their poor families must be in suffocating fear of them dying every time they take part.