This is the world's largest vuvuzela. While it may look like a fun prop, it's actually—terrifyingly—fully functional. And if you thought a stadium full of these was annoying, just listen to what gigantor here can do:
The 114-foot-long specimen was erected by Hyundai in Cape Town, and is blown at the start of every World Cup game. Presumably by the South African equivalent of Paul Bunyan. [Buzzfeed, Chris Rawlinson]