I saw one of those one time while on Route 40 in Catonsville. It was throwing stuff way up in the air and the sky was completely blue. My Dad and I was so confused by what we were seeing, but as I got more into weather, it made sense. It made it from one side of the road to the other and then disappeared. Super cool.
I was in Myrtle Beach last summer on vacation and saw a bunch of water spouts. They were wayyyy offshore, but there was a bunch of them that just kept popping up for like an hour.