Elephants

There are four elephants in a Volkswagon. How do you know when one went into your refrigerator? Answer: There is a set of footprints in the butter! How do you know when there were two elephants in the fridge? Answer: There are two sets of footprints in the butter! How do you know when there were three elephants in your fridge? Answer: you have three sets of footprints in the butter! How do you know when four elephants were in your fridge? Answer: You have an empty Volkswagon!