The loop_crazy__.challenge.gbx file you have requested: Tracks / Loop Crazy!!!! - 10.43kb is not available. Perhaps try browsing all files for the game TrackMania Nations Forever and upload any files you want to share or are missing. This is the only information we could locate:
This track features a pretty tough loop system at the beggining that is a challenge because of the speed and proper angle but the rest is a smooth ride.