A manager I used to work with told me the following story.
He was sent to America on a buisiness trip whereby awards were handed out. Best manager, best employee that sort of thing.
He won an award which was a Handgrenade mounted on a wooden plinth.
When he was comming home through customs the airport security man pulled out the handgrenade on it's plinth and asked what it was?
Manager explained it was an award to which the security man asked "How do we know the grenade is safe?"
Manager replied, dunno, lets see and duly pulled out the pin. Both stared at the grenade in silence. After a suitable time had passed the security man said,
"Guess it's safe". Placed the grenade back in his luggage and waved him through.
This was before 9/11 but kindof ammusing.