Jake the Peg: Just listened to the cartwright interview and he was right about the briscoe foot on the line incident
If his foot is on the line it's a penalty i the halfway line, if it's not it's play on. The officials just got it wrong imo
That was my thought watching it on the big screen
Briscoe's foot clearly does not slid backwards after he caught the ball so there was no way he caught it in the field of play and then subsequently put his foot into touch.
Hence, as you say, it was either penalty on half-way or play on! It was just the last in a number of odd decisions, none of which went our way.