DHL really knows how to pull some evil tricks on its rivals for its own benefit. This latest campaign, makes its competitors acknowledge the fact that DHL is much faster and better when it comes down to business. In order to pull this nasty trick on its competitors, they prepared a few huge boxes for delivery and hired its competitors for the delivery purpose. These boxes were wrapped in thermo-active foil that displayed the message, “DHL is faster” in bold. The message however, became invisible when then boxes were frozen in below zero degree Celsius. However, as time went by, and the temperature level rose, the message soon became visible to not only the competitors but every one on the street as the poor delivery boys toted along the heavy boxes, unintentionally advertising for their rivals, and desperately looking for the addresses. Watch this crazy campaign and let us know…