"Oh, Marty, be careful around that Griff character. He's got a few short circuits in his bionic implants."

—Doc

A bionic implant was the term to describe a modification to the human body by replacing certain body parts with robotic pieces by 2015. Some implants had the capability of enhanced strength, height modification, and an automatic system to block punches despite the implantee not knowing. Griff Tannen had such implants and, according to Doc Brown, these had a few short circuits; whether this was true or just a figure of speech is unclear. A newspaper from 2015 implied these implants were illegal, although proposals were around to legalize them. Some posters in 2015 urged voters to "Vote Yes on Proposition 237" in order to "Legalize Bionics".

Appearances

• Back to the Future Part II