That's not being dropped, he touched the canvas against Hernandez because his right hand was broken, it was not due to getting tagged by any punch LMFAO.
That was a slip ffs, and did you watch the Hernandez fight? LMFAO how was that a drop? He touched down cuz his hand broke, that's why he had to switch southpaw to finish the rest of the round.
Touching the canvas because he didn't want to get hit is a KD. That's like taking a knee, he took a hand. CLEAR KD. Royd dropped several times in his career.
Floyd's been dropped by Aragon as an amateur, and legit dropped once as a pro (by Judah). He took a knee after breaking a hand against Famoso, but wasn't caught by a punch. Hernandez missed Mayweather, but stepped on his foot...so no KD there, either. One KD as a pro, one KD (afaik) as an amateur.