Conversation so far:
what was the band Slipknot's image?
Slipknot is known for its attention-grabbing image; the members perform wearing unique, individual face masks.
what other things played a part in Slipknot's image besides wearing unique individual face masks?
Slipknot members also perform wearing matching uniforms—typically jumpsuits.
What else was Slipknot known for besides unique face masks and matching uniforms?
Slipknot was also known for their aggressive style of music, and energetic and chaotic live shows.
Was the band slipknot successful?
In early 2000, Slipknot was certified platinum

Question: How did they respond to that accusation?
Self-contained rewrite: How did the band slipknot respond to the  accusation that they stole their image from the band mushroomhead?