Recession-chic picnic blanket

I think it would be really cool to make a really giant (or at least pretty big) picnic blanket out of the stuff you'd lay down on the grass if you didn't have a picnic blanket.

You could sew a bunch of your old towels together and then cover it with a patchwork of your old pants or jackets or worn out blankets. If you sewed it by machine, which you'd probably need to if you were using old jeans, and quilted it up decently, it would even be machine washable. And I bet it would look pretty cool. Or at least the potential for it to be attractive would be limited only by your aesthetic vision.