Related:

• Gosh that takes me back ... or forward. That's the trouble with time travel, you never can tell.
  -- Dr. Who...
• Gosh that takes me back... or is it forward? That's the trouble with time travel, you never can tell.
  -- Doctor Who "Androids of Tara...
• Gosh that takes me back... or is it forward? That's the trouble with time travel, you never can tell.
  -- Doctor Who -- Doctor Who, The Androids of Tara...
• You cannot propel youself forward by patting yourself on the back.
• You cannot propel yourself forward by patting yourself on the back.