This video shows some on board footage of a Formula E race car being tested in the wet at Donington Park.
Round 1 of the debut season of FIA Formula E begins on September 13, 2014 in Beijing. By the way, Formula E is for "full electric" race cars. That's why it sounds strange, and why I believe this post siftworthy!
More nerdy videos: http://www.fiaformulae.com/en/video.aspx