I'm reading the definition of the rule book and it clearly states the word "boot". Not knee, thigh or arse. If we're going by the words of the rule book, that wasn't a peno. Otherwise, the rules need to be a LOT less vague. I've seen a lot of penalties given for actual blocks by the BOOT but I haven't seen any like that one. Anyone have ANY other footage of a pen for any team been given where someone strikes the ball off someones back knee, thigh or arse?
If I was to ask the referee why it was given, why is it he could say "it was a foot block", when it struck the back of the knee (the popliteus fossa). That needs to be sorted. GAA rules can be very vague but if we're taking it word for word, that is not a penalty kick.