During the 1983 World Pairs Final at the Ullevi Stadium in Gothenburg, Sweden, Nielsen was involved in one of the more bizarre tape exclusions ever seen in speedway. While lining up for the start of Heat 10 against eventual champions England, represented by 1976 World Champion Peter Collins and the highly rated Kenny Carter, Nielsen was in gate 2 and initially attempted to line up across on Carter on his inside before being forced by the official to move as he was deemed to be across the line and out of his gate. After moving he then almost broke the tapes once before coming forward again, this time actually falling over his handlebars and onto the track as he tried to stop his bike which had actually rolled over the tapes (without breaking them), leaving Australian referee Sam Bass no option but to exclude him from the race.