![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6vjN4IHbBjy2PSF-t7043Xh7lC6qyWKgpYsHkCeWkWslODytFHwt9bc0MUJC_DjJ-Yn12XLjpofgSiExIiCpq3FI0LgOP5JlkHTwTo18IaMPKf6ZA1YTgi_1kxwXl8-5urAVBTmtr8BEF/s200/tripping.gif)
1). You are getting into your car, an operation that you navigate successfully about a dozen times per day, when you bang the side of your head on the door for some unexplainable reason.
2). You are munching away on your gum, when inexplicably, your mind decides that you have a sudden taste for flesh and you chomp down hard into your cheek.
3). You are walking along a busy and quantifiably flat sidewalk in a very conspicuous part of town when you trip over an invisibility and find yourself looking up at the clouds.
How can operations such as these, ones that we have practiced time and again, suddenly go so wrong? This topic, which sociologists have considered studying for years, might even make for an exciting new series on the Discovery Channel.