Future tech from my home world -- in that version of 2015, flying cars are a thing, and the original version of Doc Brown who built me had all the necessary stuff installed on me. Granted, it was shot to shit after I was struck by lightning and sent back to the Old West, but after I ended up here, Dad managed to repair it enough for me to get back off the ground. Doesn't work as well as it used to, but. . . [she shrugs in a "I'll take what I can get" way]