When you were in college, you spent your free time drinking tallboys of Bud Ice and playing Mario Kart 64 until 5am. These MIT students, on the other hand, built a shopping cart go-kart cart and dubbed it the LOLriokart.
The LOLrioKart consists of a big stack of NiCd aircraft batteries and a 15hp brushless motor rigged up to an old shopping cart with upgraded wheels. As you can see by the video, it travels at a pretty good clip, up to 45MPH. And you've got to assume that in Cambridge, seeing a motorized shopping cart with a nerd inside tooling around on the street isn't all that shocking.