I'm all for fun surprises, but when a jet flies under a skydiver flying his canopy... not cool!
This is the result of miscommunication between ATC (Air Traffic Control), the jump plane and the jets doing a flyover demo at a nearby Nascar race. Prior to jump run, the jump plane was told to hold by ATC due to the flyovers, which lasted nearly 15 minutes. The ATC then cleared the jump plane, and after properly spotting with no signs of the jets in the airspace, they jumped.
The end result was a close call at 1200 feet.