Sub-zero ice maker is spraying water?

We came home to find a lake in front of our Sub-Zero refrigerator, Model 532. When we opened the freezer, water was shooting out from the ice maker. We tried to defrost the freezer, but it has "thawed", and the water is still spraying. Any advice would be appreciated, because it's a holiday weekend, and I doubt we will be able to find a repairman. Thanks.