There is more than one artist/band called Downer:
These are photos from concerts where Downer played, so they may be of other bands that played the concert as well.
System of a Down / Discord / Downer / Spineshank / F.O.L. Aug 5, 1997 West Hollywood, California, United States Uploaded by Bruhvvmetal
Earth Crisis / Ignite / Pushbutton Warfare / Downer / Cave In Aug 24, 1995 Northampton, Massachusetts, United States Uploaded by Pedro Garcia