Today I was out on a jetti at the beach setting up on the edge of it to make an exposure of the surf. I had my tripod set out on the edge of the jetti on the rocks and my gear in the center for protection. I went back to grab my bronica etr after making sure the tripod was steady and hopped across two rocks to it. I got the necessary equipment and jumped back. At that instant both my feet landed on a slick, slimy, algae surface that blended in with the rock and I did not see, and immediately both came out from under me and I flew through the air and landed on my back/ left elbow. My etr flew into the air and bounced once off the rock. My mind screamed as the second bounce would be at the bottom of a crevace. I kicked off the rock, sound around to my front and grabbed it out of the air, stood up shaken. The first thing I checked was my camera, the glass and mechanics seemed ok, what a tank. I then noticed my bleeding elbow. I took off my shirt and tied it over the wound to stop the bleeding and went on with my shot, a bit in pain and shaken, but determined. I was very lucky.