A British lad was given the shock of his life after opening a 21st birthday card ... Returning to the card, Charlie continued as his jaw dropped: "I've had no black box for three years?

The footage shows Charlie opening an oversized birthday card from ... "Happy 21st birthday, Charlie," before leaping up in delight at the next line: "Yay - you no longer have a black box." ...

A British lad was left utterly gobsmacked after discovering a family joke had been played on him for the past three years, upon opening his 21st birthday card ... longer have a black box." ...

More info A young man was given the shock of his life after opening a 21st birthday card ... Returning to the card, Charlie continued as his jaw dropped: "I've had no black box for three years?

A Brit received an unforgettable surprise on his 21st birthday, which saw him discover he had been the unknowing victim of a family prank for three years. "Yay - you no longer have a black box." ...