It's been a while since I've made a completely ridiculous thread, so I'll do so now.
So what kind of completely ridiculous cybernetics do you think it would be fun to have?
Some that come to mind are a jet engine installed in the butt, hands that could turn into circular saws, noses that turn into drills, and chainsaws that retract out of your... maybe I shouldn't say that one actually.
Keep in mind that even though cybernetics wouldn't be fun to have for the rest of your life, just pretend that they're temporary for the purpose of this thread.