So, when people go ice fishing, they use an ice auger to drill through the ice. think of it as a 6" (or so) drill bit. for a variety of reasons, when you break through, water usually gets pulled up onto the surface (it’s common to pump the hand crank augers up and down, or with powered augers, well, usually you don’t stop as you break through.)

if you look at the bit front and center, you can see cracks and the hole in the center of the wetspot