Related:

• That's impossible, and besides he doesn't like it.
• When the whispering starts--it's death, I tell you. Death! -- Darrius, THE KEYS OF MARINUS
• Cold milk, warm backrubs, hot baths...all temperature cheer.
• This warning from the New York City Department of Health Fraud
  Be suspicious of any doctor who tries to take your temperature with his finger....
• Being too drunk to fish is like being too fat to bowl - impossible.
• Too late, Peri. Time to say goodbye. -- The Docto
• Terran insects. Aerodynamically impossible for them to fly, but they do it.
  I'm rather fond of bumblebees. -- 4th Doctor, ROBOTS OF DEATH...
• Yes, well, according to classical aerodynamics, it is impossible for a bumblebee to fly.
  -- 3rd Doctor, THE DAEMONS...
• You know you've been hacking too long when... ...you ask archie where to find your keys.