He rose highest from a late free-kick to head home past David de Gea, and you can check it out in the GIF below:
Rio Ferdinand was the defender he beat to the header, and when the United centre-back realised the scorer, he won't have been surprised.
The former England captain praised Kim via his Twitter feed back at the beginning of the season:
Told ya, the boy Kim is a player....1-1— Rio Ferdinand (@rioferdy5) August 25, 2013
What is significant about the date of the Tweet is that it was during Cardiff City's 3-2 defeat of United's rivals Manchester City, with Rio likely having a good smirk on his face as he offered his observations on the game.
He is yet to comment on United's draw, but it looks like his comments have come back to bite him this weekend.
image: © joncandy