I'll never quite understand it (health reasons aside).
My Dad used to want to do this all the time when he used to take me as a kid. That changed when i kicked up a fuss and he stayed right unil the end of the FA Cup game against Coventry when Goater scored a header in stoppage time.
But his excuse was always 'to beat the rush'. To me it just seems like a lot of trouble to go to a game and then leave when it's 2-2. Like to me, as i don't live in Manchester, going to the game is a big deal. I don't drive, so i have to do a bit of planning, and because i use the train, it costs a bit of money aswell. So it's just a lot of effort and money to spend on something for me to not to stay til the end.
Maybe, i could understand leaving if the game is wrapped up and we've gone into 'keep the ball, rest the players' mode, but even then i find it odd. Yesterday was baffling. I know it's down to personal choice and leaving early doesn't make you any less of a fan. I just find it a bit odd. Like leaving the cinema before the films ended, or never listening to the last song on an album, or coming home from your holidays a day early.
Midweek games are probably a different kettle of fish because of train times, but Sunday afternoon games.....it just baffles me a little bit. Not a knock no you if you did leave early, it's your choice. I just can't get my head round why you'd want to, when the game is like it was yesterday.