Cannot believe it. I think the rule needs to be you can't overtake until the derny's front wheel leaves the track, so, if it's a bit slow leaving, there is less likely to be someone overlapping. In this case, I think the riders have got jumpy....but amazed that the same thing happened twice.
If they DQ'd the German he could quite rightly argue that they don't have the technology to measure it....so, if I was the man with the gun, I'd shut my eyes.
They actually set off in front of the back wheel of the Derny anyway, so they need to sort out the ruling on this one.