Quote from Bert in the episode Spoiler: Dexys Midnight Runners Get a Royalty Payment
Kripke: Too bad Wadioshack went out of business. Bert: [thinking] [chuckles] "Wadioshack." Kripke: Hey! Bert: [out loud] Sorry. It's hard to not think. It's like you tell somebody, don't think of a pink elephant. All: [overlapping] Pink elephant? Bert: [thinking] See?