Sheldon: All right. I thought the candy might not be enough so let me up the ante. These are Cooper Coupons. These are for various things I can do for you. Um, oh, this one is for one free grammar check. Uh, you could use it for emails, letters, tattoos, what have you. Um, oh, this is fun one. This is an afternoon with me at the California Science Center, where I point out their mistakes.
Leonard: Keep an eye on those expiration dates, I've been burned more than once.