Red Bull, with the help of Archrival, just completed one of the largest guerilla marketing campaigns in the world.
It was called Red Bull Airdrop. Red Bull delivered hundreds of crates filled with Red Bull to 400 universities around the world, spanning 6 continents and 55 countries. Twitter was trending #airdrop, and a simple google search will show you the impact it made. Archrival worked with Red Bull to produce the videos, campaign collateral, official website, and coordinate the drops in countries around the world.
Here is an article that Adrants put out about it yesterday: http://www.adrants.com/2012/04/red-bull-air-drop-hitting-colleges.php
Here is the official site: http://www.redbullairdrop.com
Official launch video: http://youtu.be/0qewVtzvo_0
Instagram trending: http://statigr.am/tag/airdrop
Twitter trending: http://twitter.com/#!/search/realtime/%23airdrop