Floyd Mayweather says he just likes to have fun and joke around and supposedly that's what he was doing when he took to Instagram several hours ago to tell a dummy ('Manny Pacquiao') to stop lying about his shoulder injury while slapping it around a bit.
The caption of the video itself suggests that Floyd was just poking fun at Pacquiao, but he has seriously questioned the legitimacy of Pacquiao's shoulder injury along with a number of other people who believe the injury was played up in the aftermath of his loss to Mayweather. Of course there has also been additional speculation that the injury was grossly exaggerated after what was supposed to be an a recovery period of one year turned into 4-6 months, with Pacquiao said to be on par and perhaps even ahead of schedule in his recovery on that time table as well. If you follow Pacquiao's Instagram, you'll note that he hasn't been wearing a splint on his right arm for at least a month now - which may or may not mean anything; I'm no expert on shoulder injuries.
Could Pacquiao's side have exaggerated his injury? It's possible. It's also quite possible that Pacquiao is just recovering quickly. At this point, I couldn't really care less which is the case. The fight is over, and since Pacquiao wants to continue fighting he should just do everything he can to ensure he comes back as healthy as possible - even if the likes of Paulie Malignaggi are steadfast in their belief the whole thing was fabricated.