What causes these tracks?
 

Really odd tracks in the snow in my yard. The skater tracks, not the deep tracks.

http://img833.imageshack.us/img833/9135/img0215xy.jpg

Snowa Constrictors.

Chupacabra.

Worms.

Big worms.

The midwest...even our snow has trackmarks

Bigfoot. He's learned how to drive.

Remote control snowmobile

I think it has four legs and drags its penis. Or it's aliens.

I thought maybe a remote control car, but generally one that's decent enough to move through that kind of snow is going to dig in when it turns; those tracks stay smooth in the turns.

That's bizarre.

paging Bwana ...

<iframe width="560" height="315" src="http://www.youtube.com/embed/pgJNdhOWKaE" frameborder="0" allowfullscreen></iframe>

a sled?

Aliens. It is a warning you are going to be probed tonight.

These tracks start from one of the "holes" on the right side of the picture. Those are not footprints, but something that can dig and skate.