Not your average Roush car, the Roush Horse Trainer was "designed to be a sort of mobile corral, allowing trainers unprecedented access to a moving race horse." Click here for first picture in gallery.
The large passenger enclosure has space for a trainer and veterinarian in addition to the centrally mounted driver. They can monitor heart, blood, oxygen and fitness levels as the horse walks, trots or even gallops.[via Jalopnik]