What kind of sorcery is this? I was minding my business, getting some work done on my laptop on the porch at camp, when my soda can started moving across the table! 

The can was moving slowly but steadily all on its own when I grabbed my phone to shoot video of it. Of course that's when it slowed down, but you can still see it moving.

Have you figured out what's going on here?

The condensation from the can had run down on all sides to create a thin film of water underneath it. This created a low friction barrier between the can and the glass table, and just the slightest bit of a breeze sent the empty can creeping across the table.

I was freaked out for a second or two before I realized what was happening. Magic? No. Science!