Boss: (to employee) - Experts say humor on the job relieves tension in this time of down-sizing, Knock, Knock.
Employee: Who''s there?
Boss: Not you anymore.
Newton''s 5th law:
Dunya Gol hai,
Chooha Billi say darta ha, billi Kuttay se, kuta Aadmi say, aadmi Biwi say, or Biwi Choohay say. Hence Proved. Dunya Gol hai.!