Cab B25 was a flying taxicab from the Luxor Cab Company in Hill Valley in 2015. The cab was a Citroën DS driven by Fred, who drove Biff Tannen in pursuit of the DeLorean time machine to Hilldale on October 21. It was fitted with six cylinders, and was fuel injected via a fusion turbine accelerator. Cab B25 was capable of 90 mph on the ground and over 170 mph in the air with thrusters. It also came with an 'Entertainment System' consisting of "200 local channel stereo, mobile phone, food, beverage and snack dispensing systems". A warning to embarking passengers, WATCH YOUR HEAD, was printed on the roof above the rear doors.