The Red Bull Z-Monster Challenge uses mobile augmented reality technology at bus stop installations to increase awareness of Red Bull energy shots among college-aged youth. Players use an app to "zap" virtual monsters on the glass panels within a 90-second time limit, competing for high scores and a chance to win a laptop. Reloading shots during the game allows players to receive a free sample shot. A Facebook app lets players find locations, check rankings, and challenge friends. The goal is to engage customers through an interactive technology experience promoting the product.