Early in the second half of last Saturday's Jupiler League match between Lierse and Zulte Waregem, linesman Frederick Geldhof was struck in the back of the head by a mystery object. As soon as it hit, Geldhof fell to the ground and scrambled onto the pitch, away from whatever attacked him. Disoriented and in pain, the match was momentarily stopped so Geldhof could be treated.

Oddly enough, the only foreign object found at the scene was a bit of cardboard that didn't seem capable of causing such a reaction. After the match, Geldhof clarified that what he felt did not feel like flimsy cardboard.