Jeff Gordon posed as a cab driver, picked a guy up, and pranked him by leading the cops on a high-speed chase...this has to be the most epic prank ever pulled off. Ever.

Last year, NASCAR driver JEFF GORDON pranked a used car salesman by taking him on a crazy test drive.  Some people thought it was staged, including a guy named Travis.

So Jeff wanted to prove to Travis that the last one was real . . . by posing as a taxi driver. Of course, some people think this video was set up too.

See what you think.