Surfing on Lake Superior????

Couldn't believe it. My wife and I were driving up the coast along Lake Superior in Minnesota. We were looking for "blue ice." It forms every year...looks like shards of glass built up in HUGE piles on the shoreline. But this year...no blue ice. Only these guys! Surfers wearing scuba suits catchin' a wave!! I took this photo between Duluth and Two Harbors. Would you EVER do this?? ((Bonus Keyword: "Surf"))