Update: He has stabilized, he's breathing on his own and his heart is beating on its own, still preparing for a CT scan
This brought back terrible memories for all of us. At a PPV event in Kansas City in 1999, wrestler Owen Hart was supposed to fly in on a cable and his vest broke loose, causing him to fall 50ft, hit his head on the ring, he was killed almost instantly in front of thousands of people. His brother, Bret Hart wasn't with the company at the time, but was at the event tonight.
They ended up continuing the TV show but didn't do any commentary.
As said, this wasn't a part of the scripted TV show. The 62 year old commentator had performed in an earlier match, and returned to commentary where he clutched his chest, collapsed to the floor and began convulsing. The real doctors (who normally serve performers who are legitimately injured) were there almost immediately caring for him and he was carried back stage. His collapse was seen in the background of the camera, but the rest was not shown. Commentary had gone silent and they began focusing the camera close-in on the ring so viewers couldn't see what was going on. We weren't told about it officially until about 20-30 minutes later. All information was initially coming from the people who were seated in the front rows.