looked like the ref called over the medical staff to check out sin cara. But i think how ADR (who legitimately hates Sin Cara) kept going after him, forced the ref to wave off the match. The medical staff was looking him over and ADR kept stomping on him. I think the ref was forced and rewatching it you can tell the ref was really pissed lol.
PS - I didnt know about the ADR/Sin Cara beef and that Sin Cara or someone in his crew pulled a gun on ADR during their lucha days! that s**t is cray