What If?

This page, from the creators of the popular xkcd webcomic, has some really interesting answers to hypothetical questions. Users can submit questions and one will be picked to be answered every Tuesday. Every answer is supplemented with xkcd-sytle comics. Some interesting questions I've found are, "If you suddenly began rising steadily at one foot per second, how exactly would you die? Would you freeze or suffocate first? Or something else?", "How fast can you hit a speed bump while driving and live?" and "What would happen to the Earth if the Sun suddenly switched off?", just to name a few. Click here to go to the page.