You exit the grocery store, looking around for where you left your car, and then you see it. A shopping cart is careening through the parking lot, possessed by gravity and headed straight for your car. You're too far away to stop it, and internally you curse the person who didn't take two minutes to put it in the cart holder. We all know the type: the total jerk. Well, here are 15 other things only a jerk would do. Take a look, and see if you've ever been that guy — the one everybody hates.
Click to see more on msnNOW.com, updated 24 hours a day.