>>21180933This; dumb bitch.
First, upon entering the freezing water, she most likely will involuntarily gasp (as she if she is stupid enough to jump on ice before testing it's thickness; then she lacks the metal ability to walk through and plan to override that gasping through willpower).
Second, if she makes a small hole that is only as big as how she went in, she'll need to find her way exactly through that hole again, and that would be difficult if you are jumping in at an angle and once broken through, continuing to dive at an angle; and again, all the while doing this while your body and mind are trying to combat the sudden shock of being immersed in freezing water.
Water don't fuck around, especially when it's at freezing point.