Stone might have embellished, but everything that's transpired also fits with someone that actually got hurt and tried to play through the pain. The slash was real.
No question it was a slash, but he rolled around and cried to the heavens as if his arm had been shattered into a hundred pieces.
And look!! There he is, right back on the bench. He leaves, he comes back, he leaves, he comes back, he leaves, he comes back; pretty sure that the highly paid medical staffs of 2 multi-million dollar major league hockey franchises would've found a broken arm by now.