This action took place at the end of 2008 when n!faculty's Bastian "b4d" Gaffron aced gamed!de in EPS Germany's thirteenth season on de_train.
As the highlight begins, Gaffron is behind the five train and he quickly gets his first kill on an opponent flying up on top of the four train. He then hits an interesting wall bang to white walls.
After a quick detour in the inner bombsite, Gaffron comes into the Z hall and finds his third kill in the terrorist middle. Finally, he takes two shots towards the ladder train and completes his ace.
In that edition of EPS, b4d and his team managed to reach the final where they lost in two maps against mousesports.
Im gussing the CT close to T main heard him running so he did a "standard" wallbang and got lucky. I would not say cheat even if it would have been colon. But then I don't scream cheat! every time I die like some other people I know.
I wouldn't know I have only tried cheat once and that was back in 2002 vs bots on cs_militia :D
*edit*
by looking at the video again it looks like the guy in white is dropping a AWP so maybe he was at T main and tried to pick a entry frag. Anyway its impossible to know without watching the whole round preferably on a demo.