I have played this video (and others) in real time and slow motion repeatedly, and to this day I have yet to see the alleged low blow that felled Buchanan. I'm not suggesting the scot was faking it, but could he have simply succumbed to the cumulative effect of Duran's punches, rather than a single shot to the groin?
In knee-jerk reacting fashion, people first refered to the shot Ali decked Liston with as a "phantom punch." Well, it happened in such a flash, one could miss it while blinking, but in slow mo, the impact is clearly revealed. The same can't be said of Duran's alleged foul, which if seen by the ref could have disqualified him.
If anyone has or can find a video that clearly shows Duran's low blow landing, please post it.