Helps the ball zip better on passes as well as lube up the grass for sliding. That's why you will often hear that a light drizzle is the best weather for soccer.
Naive play from you in injury time there. Just keep the ball and run the clock down. Cost me a small fortune! Not sure where the 5 minutes came from right enough.
Like I said, I know less about soccer than anyone in the world but I saw 3 guys with no freaking idea where the opposing players were, flat out had their heads up their ***** .