Two more cool things

Here's another Coke/Mentos video (ws). I don't know why I find these amusing, but I do. Here's the original.

And here's a great idea from Xerox: temporary documents. It's an ink/paper combo in which the ink disappears after a few days, so you can keep reusing the paper.

Maybe I'll actually post something one of these days, but until then these links will have to do.