Wilco has published a video on YouTube that shows him and others climbing K2 in 2008. He was one of the climbers that made it to the summit, yet was lucky to survive and come back alive. He later had severe frostbite.
One thing was obvious was how late it was when he and others were on the summit. The sun was setting which was going to prove to be a very dangerous late time to reach the summit. There was a shadow of K2 that was incredibly long and surreal stretching over many surrounding mountains.