Possible Clues:

• Touching instruments has an effect
• Indirect consequence
• Indirect consequence of some action
• One of the consequences of writing note on Drumm's report
• Backlash from grim visitor wanting a pillow with different filling
• Indirect effect concerning group taking a beating?
• Indirect effect; echo
• Consequence of giving drums to soldiers
• Impact on kitchen
• A consequence of botched prison rescue