Hunters with the Crashin' Thrashin' Racer Controller do not have to wait for the casting bar to dismiss there pet. With just a simple macro that you have to press only once or twice your pet will be dismissed instantly.
/use Crashin' Thrashin' Racer Controller
/cancelaura Crashin' Thrashin' Racer Controller
The Racer is a pet making your previous pet disspawn. This is usefull for an reason you want to dismiss you pet... It's just faster! :P for example if the tank jumps down in nexus to skip a pull.