Helen Keller and the Roller Coaster

Listen here, you smooth-brained buffoon. You asked why Helen Keller rode a broken roller coaster. The punchline is, and try to keep up, she didn't see anything wrong with it because she's blind! It's a pun, you imbecile, based on the double meaning of the word 'see.' She literally can't see the coaster, and so doesn't 'see' a problem with it!