Related:

• I don't need a friend who changes when I change and who nods when I nod
  my shadow does that much better. -- Plutarch...
• Now, people - both my admirers and those wishing to hit me over the head with the collected documentation of the VMS OS (that i
  hose who can LIFT the bloody thing) - it is not my propensity to say "hear, hear!...
• Be careful when throwing a boomerang - you might hit the back of your head.
• You have there hit the nail on the head.
• The last time I saw a head like yours was in a bottle .
  .. I'll hit you on the top of your head so hard I'll drive your head down into your ribs....
• New Hampshire law forbids you to tap your feet, nod your head, or in any way keep time to the music in a tavern, restaurant, or cafe.
• Akira: We learn karate, so that we need never use it.
  Bart: Um, excuse me, sir. I already know how not to hit a guy....