Kansas in late December, front moved in as we were headed out there, woke up to -5 degrees and -20 windchill. Went to a flooded cornfield and it took 5 of us jumping up and down in a group to break ice. Cut my waders wide open on it, thought I was gonna die. Solid ice in my boots and we had to take turns busting the hole back out every few minutes. You'd bust it back out and step out of the water, then pound on your knees to break up the ice enough to bend your legs and sit down.