Haubourdin 1994, luminous oval identified as an advertising laser

Summary

In January 1994, a couple in Haubourdin saw a luminous oval shape moving across the sky without touching the ground, accompanied by a hissing sound. The investigation quickly revealed it was an advertising laser projector being tested at a nearby nightclub. Several witnesses in other towns reported the same phenomenon, and some had been previously informed about the device's trials. The conventional explanation fully resolved the case.