This is the most amazing goal I've witnessed live and I can tell you a little about it:
Arsenal is the most hatted rival of Tottenham. I mean they really hate each other. Think Red Sox vs. Yankees but even worse as they are both in North London.
Tottenham had been rising to power 2 seasons ago and a victory against Arsenal would help them into a Champions League spot. But traditionally Arsenal is a better squad and Tottenham hadn't beaten Arsenal in something like 15 meetings.
Danny Rose was making his debut, this goal was (I believe) the first time he TOUCHED the ball in a Premier League game. His first touch defeated Arsenal and put Tottenham into the Champions League. And it's a fucking nasty first touch: