cauz marquez drank his own **** and ate his own **** so that he could gain tommy hearns power and marvin hagler chin. and he stepped on manny's foot.
You forgot about the hyperbolic chamber & the cups on back thing. (Plus him being a better boxer helps)
There's probably several reasons why he got knocked, but I believe he didn't respect Marquez's power, and thought he would be able to just overpower him. Afterall, Pacquiao had put Marquez down 4 times in their previous fights, something Marquez couldn't manage to do, so why would he think, a much older and somewhat blown up Lightwieght in Marquez, would be able to do it in their 4th fight.
I think its mostly because..... JMM landed the perfect punch, and pac was kind enough to oblige by walking right into it. Quit making excuses ffs
Those saying the foot thing had "no effect" on matters are living in denial. It may not necessarily be the reason why he was knocked out the knockout may have occurred regardless but it has to be a major reason for why the punch was as devastating as it was in the end. (I don't think I've seen all the angles yet haven't been too bothered to search them out so I reserve the right to change my opinion on this.)
Pacquiao was doing Jimmy Kimmel sketches whilst Marquez had cup therapy, it's no surprise then that Juan Manuel won the fighter of the decade super belt with a jolt punch Manny ran onto.