Liquid Nitrogen bomb! A ship floating on invisible hexaflourid gas! Smoking can kill you and weld metal! Nuclear Chain reaction... with balls! Detonating gas in a can!! Water flowing uphill! 100,000,000 volts and a Faraday cage! And more from Physikshow at University of Bonn.
Fun Motion - a blog dedicated to physics-simulating games, currently with 49 reviews (and counting) of well known favorites like Stair Dismount and Truck Dismount, Towers of Goo, Toribash and many, many more. (A follow up to my previous YouTube post.) Kiss your precious, fleeting motes of productivity goodbye, cube-farmers!
We need to get Stephen Hawking an AskMe membership. Stephen Hawking asks the Yahoo public how the human race is going to survive. Yahoo staff are excited. But the answers? Well, let's just say that there may be more utility in eating tweens after the nuclear apocalypse than listening to their ideas. To balance the stupid, Hawking has several of his lectures online. And there's great stuff on PBS's Stephen Hawking's Universe (though it's aimed at providing a basic understanding of astrophysics). Or, for a more animated view MC Hawking's (sometimes clumsy) "What We Need More of Is Science. (Previous mefi hawking here, here [where he seems to be answering his later question], here [where he presents another view on how humans will survive], and here.)