I was hunting on a mountainside, feeling pretty powerful with my rifle. Then a B-52 flew by, below me, close enough to see the faces of the crew.
If a military jet flew close over the top of a hang glider or paraglider the wake turbulence could easily tear your wing up if they were going fast. Fortunately, if we are at low altitudes we are usually scrapping for ridge lift very close to a hill, that they are not likely to get near. If the lift is good then we tend to be at higher altitudes than what they come through there at.So I am aware of no close calls.