Since I don't have an oscilloscope, for fun I got to noodling on how I could do a test with things I have. Since I have a camera, my thought was to photograph something moving fast at a known rate of speed, using only the flash for illumination, and measure the amount of movement in the photograph. How about my drill press? After a bit of calculation, I see that this is not practical: Drill press tops out at 3200 RPM. This means that a single rotation takes about 19,000 μs--way too slow to measure Iconiclastica's 10 μs flash.
Then I thought about a guitar string. The standard high E is tuned for 329.23 Hz. So one complete back and forth traverse of the vibrating string takes about 3,000 μs--still way too slow to show much blur with a 10 μs flash.
The bullet from a .22 caliber rifle might work. Muzzle velocity ranges around 1500 feet/second, and I have a friend who has the ballistics equipment to precisely measure the speed of a given bullet/rifle combination. Such a bullet would travel about 2mm in 10 μs. Properly photographed, any zone of blur on such a bullet is measurable. But for this, I'd need to buy or build a motion actuated flash trigger--and I'd much rather put the money into an O-scope.
What this drove home to me is that a 10μs flash is very fast indeed. OK, not as fast as the air-gap equipment Harold Edgerton used, but impressively fast nonetheless. Nice piece of kit you have, Iconoclastica.

--Chris S.
PS--If I've messed up a decimal or something in my calculations, please correct me.