There’s a story about Van Halen and M&M's. The band's tour rider was said to specify that a bowl of the candy always had to be waiting backstage with the brown pieces removed. If a single brown one was found, all bets were off. Lead singer David Lee Roth later claimed this was only a litmus test, a kind of a marker for the ability to follow instructions. “We have a very technical tour operation,” he explained.
from Nora Maynard http://feeds.thekitchn.com/~r/apartmenttherapy/thekitchn/~3/6-9vZL47DEA/the-celluloid-pantry-big-cold-cuts-small-bread-this-is-spinal-tap-26161