Van Halen stipulated in their performance contracts that a bowl of M&M’s, with all of the brown M&M’s removed, was to be placed in their dressing room. They didn’t do this to be jerks, but as a simple test to see if more important safety and quality specifications were attended to as well.
According to David Lee Roth, this was listed in the technical portion of the contract not because the band wanted to make capricious demands of the venue, but rather as a test of whether or not the contract had actually been thoroughly read and honored, as it contained other requirements involving legitimate safety concerns. If the bowl was present, then the band members could safely assume the other, legitimate, items in the technical rider were being fulfilled to their satisfaction. Conversely, if the bowl was missing, or brown M&M’s were present, then the band members would be within their rights to have the venue inspect the work, ask that it be redone, etc. Their concern for safety was real: during their earlier tours, not only had equipment been damaged, but several members of their road crew were nearly electrocuted, both due to inadequate safety measures and preparation on the part of the local venue.