Either a hoax or a future Darwin Award candidate
I was checking out the AMT Netherlands website. They make these really slick little turbojet engines, primarily for model airplanes. I found this in their photo gallery: Ulik
The claim is this stuntman put a 42 pound thrust turbojet on his back and hit 130 KMH (80 MPH) with inline skates. Now, I admit there are people crazy enough to do this but it seems like a hoax to me. If not, this guy is cruising for a Darwin Award.