I watch quite a lot of football - got the Liverpool v Spurs game on as we speak - and the number of times i have heard a commentator or pundit cry "Penalty!" or "That's a red!" only to change their minds on seeing another 3 different angles. Easy for them, terribly difficult for the match officials. And this from a guy whose team have only been given 1 penalty in about a million years. Actually it's one in 67 games - we did have one awarded earlier in same match, only for VAR to take it off us!