In reply to Nj: I'm not disputing that you're strictly correct, of course, but in my opinion it gets silly when we try and split hairs this finely.
To make the distinction between a no-stop ascent and a second-try might be justifiable for bouldering, where ropes don't figure anyway: that sub-sport is inherently more artificial and therefore needs more strict and refined rules.
But if you turn up with no prior knowledge of a route, then lead it from start to finish and without weighting the rope at any point you should be awarded the full "flash" tick with all the brass band accompaniment. Cratering is only uncontrolled downclimbing, after all! I'd be miffed if I had a quick look at the problem start of a route then had the "flash" disallowed because I jumped off and started again.
Sorry to wander off topic. Whether this ascent counts as a flash or not, it's an amazingly feat of skill and daring...