What are the most unusual reasons for stoppages in play you can remember?

During today’s game of Coventry City v Luton Town, play was briefly interrupted by a paraglider flying overhead. The referee stopped the game for about 30 seconds (presumably just in case the nutter decided to land in the middle of the pitch?) before the paraglider flew away from the stadium. It’s definitely the strangest reason for stopping play that I can remember.

Does anyone have any other memories of times play has been unusually interrupted?