Red Light Answer

[Mike Gray]

Originally Posted by Jason Oldfield

Now, does all this mean for certain that the photographers flash caused this event to occur? Absolutely not, but from a scientific standpoint, it seems awfully coincidental that the photographers flash goes off, and immediately afterwards the red light comes on. I'd have to see the original footage frame by frame (you can't do this on YouTube) to see what the timing difference is because optical sensors are fast acting. If the timing difference is long (i.e. more than a few tenths of a second), it would seem likely to me that something else must have caused this to happen. But, if it is literally the next frame as somebody else posted, stray IR light from the photographers flash is a distinct possibility.

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If you look at the You Tube video in full screen then drag the small circle on the timing bar you can move ahead to the location of the run in question. Keep holding down your mouse and you can rock the picture back and forth. At 19:13 the 1st yellow is lit and the camera flash is visible at 19:14 it shows the 2nd yellow on and the red light on at the same time.
It may not be close enough to determine the length of time it took but I enjoyed the lesson.

[Doug McCue]

with your normal curve displayed, you have not given any evidence to say the flash has anything to do with the red light. You will have to do more research in order to make any statement of any kind.