Uber is adding an impressive new vehicle to its fleet: the leader of the Autobots, Optimus Prime. As a promotion for the upcoming Transformers: Age of Extinction, Uber will be offering users in Dallas, Phoenix, and Los Angeles a chance to ride in the iconic fire-clad truck. Prime will be in each city for a six-hour long window, during which time you can simply choose the autobots option on the Uber app when requesting a pickup — though rides will be limited to just 15 minutes long. Theres only one Optimus Prime, says Uber, so making contact will be difficult and may take many tries.