With a 6-4 record and losses in three of his past four fights, Robert Turnquest might not have been at the top of the list of fighters you’d expect to see pull off one of the year’s most gruesome submissions. But on Friday, at Titan FC 45, Turnquest (7-4) dropped a wicked armbar on Taylor Krahl (7-6) that had the MMA social media world squirming. After tapping, Krahl needed plenty of looks by medical staff – and his corner was livid with the referee for allowing the fight to continue when it appeared to be clear his arm already had been dislocated even before the finish. The finish, which came at the 1:54 mark of the first round, was brutal enough that UFC featherweight Jason Knight, who fought for Titan FC before getting signed by the UFC, posted it on his Facebook page