He probably thought Robinson kicked him from behind. I’ve heard people who have torn Achilles say this exact same thing many times — they want to know who kicked them in the back of the leg.
My guess is that Kuithe felt something like that, went down, and told the team he felt Robinson took him out from behind.
Of course, the video shows that that’s not what happened, at all.
Just like the video showed JoJo was held.
Just like the video showed Glasker didn’t have Rose’s facemask.
Just like the scoreboard showed 22-21.