Shitty dude. Get that cast protector and stay out of the damn park and off the slopes on icy days. If you stick to riding in good conditions and can hold yourself back from tricking over every broken twig out of sheer boredom, you should be fine.
JUST STAY OUT OF THE PARK. You know in a few weeks, right before you get the cast off, you will think it feels fine and will want to try something. Just hold back.