Lazy Halloween Costume Ideas

[packbat]

Okay, so here's the deal. I don't have a Halloween costume. I don't have the materials to make one. So, what should I dress as?

• Myself?
  
• A clone of myself?
  
• My counterpart from an identical alternate dimension?
  
• A philosophical zombie?
  
• A doppelgänger?
  
• The Thing?
  
• A T-1000 shapeshifting robot?
  

Or something else? Any suggestions?