Before the start of the NASCAR season, one of the most popular drivers went undercover as a Lyft driver and surprised her customers on rides around Charlotte.    Danica Patrick wore sunglasses and a winter hat to disguise herself from the riders.

She proved to be a friendly, if unorthodox driver.

A humorous warning accompanies the video on Lyft's YouTube page:  "Viewer be advised: Danica is driving the way she is because she is a pro. Also, Danica does what Danica wants. Please don't drive like Danica."