Related:

• Boy, it's getting harder and harder to make it here by ten.
  -- Chief Wiggum with the early-morning blues, "The Secret War of Lisa Simpso...
• Think harder.
• Carpenters hammer it harder.
• Carpenters nail harder.
• I bite harder ...
• If it ain't broke, hit it harder.
• Sin harder! Ragnarok is coming!
• Skydivers go in harder.
• The easier it is to do, the harder it is to change.