The 911 call reported cardiac arrest. It’s in the NY Post article. I don’t find it cryptic and I feel people are reading into it too much. He was making a joke saying he’s “Mattman,” like Batman, not completely out of the ordinary for a comedic person to say, IMO. I read all his Mattman Insta posts and it looked to me like he was just joking around. I don’t know. Sure, I could of course be wrong. I guess we’ll likely find out after the autopsy.