Juan comes up to the Mexican border on his bicycle.He has two large bags over his shoulders.
The guard stops him and says,"Whats in the bags?"
"Sand"answered Juan.
The guard says,"We`ll just see about that get off the bike."The guard takes the bags and rips them apart,he empties them out and finds nothing in them but sand.
He detains Juan overnight and has the sand analyzed,only to discover that there is nothing but pure sand in the bags.
The guard releases Juan,puts the sand into new bags,hefts them onto Juan`s shoulders,and lets him cross the border.
A week later,the same thing happens.The guard asks,"What have you got?"
"Sand" says Juan
The guard does his thorough examination and discovers that the bags contain nothing but sand.He gives the sand back to Juan,who then jumps back on his bike and crosses the border.
This sequence of events is repeated every week for three years.Finally,Juan doesn`t show up one day.So the guard,after work,decides to go into Mexico to find him.
He finds him at a cantina.
"Hey buddy,"says the guard,"I know you are smuggling something.It is driving me crazy.It`s all I can think about,,,I can`t sleep.PLEASE,just between you and me,what are you smuggling?
Juan sips his beer and says,"Bicycles."

 

There's and old shipyard story about this guy going up to the gate pushing a wheelbarrow with 5 gal cans in it and the guard stops him, tells him he can't take the cans, the guy takes the cans out of the barrow and pushes the barrow on out to his truck. Thik the guy was stealing the cans?