Once my goalkeeper was injured during the 2nd half of a game with the score 1 apiece....I didn't have a backup goalkeeper so I couldn't sub him off,the opponent's player shoots from long range only to be saved by my striker who was acting as the new goalkeeper....With some 15 mins to go my goalkeeper cum striker goes on a marauding run and scores the winning goal....What's funny is the fact that I wasn't attacking at all and yeah,I definitely didn't have the red arrow on him before anyone brings that up...
At the end of the day it's just a random game,so don't be surprised if you see some strange things happening in the game :P