Flying Tumbleweed Tornado

I was amused today during lunch since I saw something that I've never seen before.  I've seen dozens, perhaps hundreds of dirt devils and I've seen many pictures and movie interpretations of tornados.  But I had never seen a Flying Tumbleweed Devil ever before.  It began over by the football field and it progressed across the back parking lot of the school, at least ten swirling tumbleweeds flying off the ground going round and round.  I've seen the plants get pushed around by the wind before, but this was ridiculous.