I am 34 years old, i have been surfing since I was 11. Now when I go I get shocking sensations in both my arms at the same time. The first time I thought there was something in the water, like a power line, it was that strong, then i thought it could be lightning coming. No one else around me felt it so i figured it was me.No injuries, surgeries, I am in better than average shape, and no drugs. What could this be/