It looked like poor technique. The pilot did a curving approach to the middle of the runway, over-flew the centreline in a slight left bank, got way too slow for a jet and hit the ground right wing first in a 30° nose down attitude..
The occupants walked away! The pilot looked to have a badly cut face, probably knocked out as it took about 2 minutes to get the engines shut down.
The crash was after the air-show had finished, I was hanging around to take some photos in the late afternoon sun.
