Zlu Haller has made the FA of Knockin' on heaven's door, which he calls "...one of the purest and [most] uncompromising highballs I have ever done" at Sundergrund in the Zillertal, Austria.
At this time of year, bouldering shouldn't actually be possible in the Zillertal and even less so at Sundergrund, which is an area on relatively high altitude. This year however, no snow, wind and 8 degrees made the conditions ideal.
Zlu says the problem is around 8A or 8A+ and that he "...sure dumped a lump in my pants but I'm happy I could get the first ascent of this amazing line."Source: Klettern