Archer's fear of cyborgs comes into play when Kreiger offers Gillette a pair of robotic legs on Archer. "Legs" is the third episode of the show's fourth season.

Archer Season 4 Episode 3 Quotes

Ray: Blow me.
Sterling: Why? You couldn't feel it.

Now it requires literal leg work, Ray. Like walking and maybe running. But hopefully not running because I'll be in brand new shoes.