Would you rather [time-travel edition]...

Let's say you went back in time 30-50 years. Let's also say you're morally corrupt enough to co-opt something from the future and present it as your own. For example, the iPhone, or "Wannabe" by the Spice Girls, or the hamster dance screensaver, or... literally anything created post-1990.

What would you choose to claim as your own invention, and why?