I had this happen to me one winter while fishing the feeder lakes north of devils lake, scared the crap out of me. I was sitting in my flip over had one line in where my vex was on. I turned towards the vex and saw this object which looked like it was frozen staring at me. If anyone has been lucky enough to tangle with the marsh hare you know these little demons have no fear when it comes to facing its enemy. I ended up chasing it back down the hole and left to a different spot. Craziness