Jumping at Richmond can be very dicey at times. There was a much closer call a few years ago at NW, when two sticks of trainee paratroopers exited sim doors over the PTS DZ (at the south-western end of the airfield, can't remember the name). The stick were a bit slow in exiting and ended up descending over RWY 23, passing through the wake turb of two VERY recently departed Macchis at about 500' and hitting the ground with a thump.