Yes the 2nd one you allude to he flagged then put it down again very quickly as if he had no clue whether he was right or not so ref ignored it then thought sod it might aswell give Barnet a chance to win the game, then changed his mind as you said and invented a foul
If the liner was sure about his amazing g eyesight they normally wave their flag furiously in a 'look at me I'm so special, I've seen something nobody else has' sort of way but he didnt cos he was an absolute buffoon