Sheldon is angry at Stuart for ruining the latest Hellboy comic book for him with the spoiler of "it's mind blowing." He tries to get his revenge by ruining the latest issue of The Flash.

The Big Bang Theory Season 2 Episode 22 Quotes

Raj: Interesting. Penny's current suitor asking advice from Penny's former suitor.
Leonard: Thanks for close-captioning my pain, Raj.

Stuart: Here Sheldon. I pulled the new Hellboy for you. It's mind-blowing.
Sheldon: Excuse me! Spoiler alert!
Stuart: What? I didn't spoil anything.
Sheldon: You told me it's mind-blowing, so my mind is going into it pre-blown. Once a mind is pre-blown, it cannot be re-blown.
Stuart: I'm sorry.
Sheldon: Said the Grinch to Christmas.