For what it's worth, I'll relate this to you, try not to get too bored...
I was mountainbiking a few years ago when I hit a patch of shale on a slope. The front end had washed out and, because I had been too lazy to change my cleats on my old SPD shoes, I slid for quite away with my foot stuck in the pedal and in the process managed to skin my leg right down to the tissue under the skin. It was a horrible mess, I had stones in my knee and my leg was skinned. I washed it and my mates suggested I wait and that they would pick me up. I declined because we were only 10 miles from the cars.
The fact is that when I set off I was like a bat out of hell, the guys who normally kicked my **** couldn't keep anywhere near me and were crying out for me to back off, but my natural adrenalin had given me a massive boost, which became apparent when it started to run out a few miles on and I slowed to the point that they had to wait.
The point of my endless waffle is that adrenalin can make a huge difference, and Schleck's effort proved nothing other than his anger. This forum does get a tad paranoid!