It is fly season, and there are loads of them. They hang around on ceilings and then they fall down onto the altar, and onto the floor, and they are such rubbish flies that they just sit there as you swat them, and do not even bother trying to fly away.
The photos are from the Chapel of the Venerable Louis-Marie Baudouin. The flies are real.
Click on the pictures to see the full horror of the flies. They only started arriving yesterday!