It's loud, it can be annoying, and its sound can terrify an unsuspecting bystander. So it was only a matter a time before people started blowing them in their friends' ears from mere inches away. In this clip, a World Cup fan shocks his buddy in the stands, as commentators laugh on. Careful now, these things can cause hearing loss.
More unsuspecting friends and relatives get "vuvuzela'd":
Perhaps the ultimate vuvuzela prank will come if Brooklyn video producer Adam Quirk has his way. Quirk is raising money online to hire 100 vuvuzela players to play nonstop in front of the BP headquarters in London, to protest the company's response in the wake of the Gulf Coast oil spill.