JB73 - I haven't seen the vid clip and it may look out of control, but those guys know EXACTLY what they are doing. Occasionally they it get it wrong like any racing driver, but their skill is incredible.
Although everyone has the same reaction times, rally drivers have a very specialised brain 'map' which allows them to push the boundaries further than most of us. Same goes with other high speed, dangerous sports.
It's a good sport to watch - seen the British rally a couple of times, got rained on both times and was soaked. The crowd is warned of approaching cars by marshalls with whistles, and usually there is no crowd allowed where the car could run-off.