Mad Cowbell Disease
When a drummer gets so obsessed with a cowbell, they start playing it when it's not their turn. It's like they're trying to be the star of the show and the cowbell is their sidekick.
"The cowbell wanted to shine. I had to play it.", @SidekickDrummer
"I played the cowbell during the bass solo. The bassist was confused.", @CowbellSidekick
"The cowbell had a plan. I had to play it.", @DrumPlanner"