I found out about this from the Mental_Floss blog:
Amazon is selling a Laptop Steering Wheel Desk. The actual, logical use of such a desk is for truckers or business people who live out of their vehicles and can use this desk when they’re parked.
But the first impression you get when hearing about the product is something different, and so there have been a number of parody reviews posted by smart-alecks at the Amazon.com site based on that premise:
This has been a total lifesaver. It allows me to prop my sheet music against the wheel, allowing me to play the guitar with both hands while driving.
There are quite a few reviews; you can narrow down the number, as Mental_Floss suggests, by looking at just the 5-star and 4-star rated reviews. Some of them are pretty funny.