the other day i was in the gym.  I was looking to do deadlifts.  Theres three racks in the place.  2 smith racks which people are squatting on and another rack.  
Wouldnt you know it,...there's a guy doing reverse forearm curls in the rack.  This guys walks around all intense and slow like the lactic acid is filling his entire body.  I go over to him and ask him "how many more sets you got?"  He looks at me all annoyed, takes his ear bud out and goes "2,...why?".  I said "why?... because I thought these racks were supposed to be used for squats and deadlifts and I was hoping to do some deadlifts. you finish your forearm curls though".  
Of course I sat on the bench about 10 from the rack and waited.  he did 1 more set and said "all yours man."
Christ.