One day a duck walked into a convenience store at two o'clock. "Do you have any duck food?" the duck asked. "No, we don't have any duck food," replied the clerk. "OK, thanks anyway." And the duck walked out.
The next day at two o'clock, the duck walked in again. "Got any duck food?" he asked. The clerk became a little annoyed, "No! We don't have any duck food." "Fine,"answered the duck and walked out.
The third day at two o'clock the duck walked in and asked the same question. The clerk lost his temper. "I've told you twice; we don't have any duck food. We've never had duck food, and we never will have duck food. If you ask me again, I'll nailed your feet to the floor."
The next day at two o'clock the duck walked in "Got any nails?" "No," answered the clerk. "Good. Got any duck food?"......ha.