It would seem clear from the video below that we have now reached the zenith of flopping in sports.
According to From the Marbles, this is a motorbike race in Brazil, in which a biker lost control of his motorcycle (0:10 mark). When he was unable to restart his bike, he apparently thought the next best thing to do was to run out to the middle of the track and pretend like he was seriously injured so that the race would be stopped (0:38 mark).