Shot at my local for the club competition on the theme of movement, this involved a good deal of trial and error to get the timing right.
ISO 400 and f/11
Speedlight off camera (cable connected) and set to repeating flash for 8 bursts at 10 times per second at 1/32 power.
Camera tripod-mounted and an exposure time of 0.8 seconds, which was the minimum necessary to record the 8 flash bursts
Thanks to committee member, Derek, for his assistance playing the shot.