Nah I've seen them. His arm flops down in a way that's not normal for a conscious person. Then it sort of flops forward a few inches. THEN Herb comes in to check and Ben has turned a bit away from the cage, adjusting his grip a little. By the time Herb is checking on Robbie, there's no question that Robbie is conscious and beyond that seemingly fine. His immediate objection shows that WHEN Herb checked on him, he was okay. But I'm talking about when his arm goes from grabbing across Ben's face to just dropping like a dead fish to the mat. There is literally no way you can look at that and think that is how someone that's conscious moves their arm from grabbing across his face to the mat. It just flops down.
I told this story a few times, but in a NAGA tourney in 2011 or 2012 I actually had a teammate get choked out with an arm triangle during a match for a second. The ref didn't see it, and he woke up immediately and started fighting the choke again. He ended up escaping it and winning the match. But he was absolutely out for a second. The point being, Robbie may well have been able to come back and win that fight. But it looked to me like he was out for a second. If Herb didn't KNOW he was out (which it didn't look like he did since instead of instantly stopping the fight, he waited a couple seconds then checked on Robbie---who as I said was okay by that point) then we agree he should NOT have stopped the fight. But that's a separate argument than whether Robbie went out for a second or not. Watching his arm flop down like a dead fish like that, no way is anyone gonna convince me he wasn't likely out for a second or so.