I was there and had completely forgotten that. You were right, the guy was miles out. Reckon it was near the halfway line. It was a beauty, sailed straight in.
The following spring to mind.....
1) Kit Napier v Chesterfield. After an almighty melee in the goalmouth where 8-10 players were all taking kicks at the ball, the goalkeeper eventually emerged with ball in hand. He assumed that the ref had blown for a free kick and as everyone retired upfield...