Jarre held a very wet and muddy concert at the Gammel Vrå Enge Windmill Park near the city of Aalborg in Denmark, on September 7, 2002, with 40,000 spectators (including 5,000 VIPs). Danish band Safri Duo featured on the track "Aero", which in fact was Bourges 2 from the performance earlier that year, and Rendez-Vous 4. The concert was broadcast live on various TV stations around the world and a shortened one-hour version was made available for rebroadcast.
By no fault of Jarre, due to 22 millimeters of rain and lack of proper preparation for and execution of the event, it took several hours for all people to be able to leave the area, and many cars were stuck until the next day. The problems subsequently became a big issue in Danish media, since, had there been an accident, it would be extremely difficult for help to get to the location. Two years previously, nine people were killed at Roskilde Festival, which had brought focus on security at large concerts. Preparations for AERO were later proven to have been lacking, and the police investigation concluded, in part, that permission for the concert should not have been granted. Reactions from spectators were mixed, some claiming it was unsafe, and others saying it was a case of overreacting.