Note: This post originally appeared on my other site arramblings.com. Please visit it for more of the latest Augmented Reality apps, news and tips.
BullDash by Explorence tracks your run using GPS and pushes you to run faster by sicking a bunch of bulls after you.
The bulls appear on your running map and can be heard through your headphones as they get closer to you.
Currently, the app is only available for iPhone. It is unclear if Explorence intends to release an Android version.
Check it out: