If there's any reason to have a decent PC that can run Grand Theft Auto IV, it's gotta be this. Full-on Back to the Future madness. This fantastic mod steps you into the shoes of Marty McFly, complete with a flux capacitor-toting DeLorean that really does time travel at 88mph, leaving a delicious trail of fire in its wake, that yes, even sets cop cars on fire. Ace.
Watch the video, set your jaws to drop, and be amazed. The only downside is that the whole mod isn't available as a whole download, but who knows, it may make its way to your GTA IV installations one day, and if you're brave enough you might be able to tinker around to get something similar yourself. [YouTube via Kotaku]