Yeah what a wonderful comeback, I know after the first half a lot of Manchester United fan watching the match from there home offed there TV because they felt they have lost, they will be so shocked seeing that there club later won with 3 goals, soccer is full with surprise,
I am one of those fans that were caught in this net though in a different way. I wasn't feeling intrigued to make a bet as of yesterday but then checking my Stake account I realized I do have a very small x amount of money left there, reluctantly I just made predictions on two games including this Manchester United match. Since they were to play against a weak side I gave them a straight win. 
Watching the game get to 80 minutes with just 10 minutes left to full-time whistle and with their opponent Southampton leading by 0:1, sincerely, I gave up on the game with just a glimpse of hope for a 1:1 draw at best. But lo and behold Amad Diallo made that late show and it was all green for my bet
Manchester United later winning Southampton by 3:1 was unimagining considering the minutes left to end the match. When I saw the scoreline, Southampton leading by 0:1 at 80 minutes of play, I thought the least Manchester United could do, was to equalize the game, anything away from that can't happen because Southampton is holding Manchester United down not to equalize them. Equalizing them and winning upon that, came as a full-blown surprise to me, as a particular player ''Amad Diallo'' is the one that scored the 3 winning goals at intervals of play 82, 90, 90+4