Was the police chasing him?
A Motorcyclist Loses Balance and Meets Tragic Death at Concrete Barrier
Using something formed out of concrete to slow a motorcycle down, is a questionable decision, to say the least... I can't speak for anybody else, but using the brakes and sitting upright to collect as much air as possible, has always been my preferred method of speed reduction on a motorcycle...
Perhaps I'm being 'old fashioned', but based on this evidence, I think I'll keep doing what I'm doing.