Native American with ambition

 An  Indian walks into a cafe with a shotgun in one hand  and pulling a male buffalo with the other.
He  says to the waiter:

'Want  coffee.'
The  waiter says,
 
   'Sure,  Chief. Coming right up.'
    He  gets the Indian a tall mug of coffee.
  The  Indian drinks the coffee down in one gulp,
  Turns  and blasts the buffalo with the shotgun,
  Causing  parts of the animal to splatter everywhere
  And  then just walks out.

  The  next morning the Indian returns.
  He  has his shotgun in one hand, pulling another male  
   buffalo with the other. He  walks up to the counter and says to the  waiter

  'Want  coffee.'
  The  waiter says 'Whoa, Tonto!

  We're  still cleaning up your mess from yesterday.
  What  was all that about, anyway?'
  The  Indian smiles and proudly says ...

  'Training  for position in United States Congress:
  Come  in, drink coffee, shoot the bull,
  Leave  mess for others to clean up,
  Disappear  for rest of  day.