You don't remember that? It's one of the things that I'll always remember about him. So, whenever the "Willian is shit, sell ASAP" threads come out, I think, "Yeah, we could do better, but I like him, so I'm okay for him to stay".
This happened at the Bridge 2 years ago when we beat Spurs to mathematically eliminate them from the race (this was in the first half IIRC, not sure what the score was at the time). The caption in the tweet is wrong though. He was showing it to the Tottenham supporters when they were giving him some stick. Even better.