The circus was in town, and the owner walked into a local bar to promote the show and mingle with the townsfolk. He was surprised to find everyone crowded about a table watching a little show of their own.
On the table was an upside down pot and a duck tap dancing on it. The circus owner was so impressed that he offered to buy the duck from its owner. After some haggling, they settled on $5000 for the duck and the pot.
The next day the circus owner came back to the bar in anger, “Your duck is a ripoff! I put him on the pot before the whole audience and he didn’t dance a single step!”
“Look, a deal’s a deal, so it’s not my problem anymore,” came the retort of the duck’s former owner, “but did you even bother to light the candle under the pot?”