A near disaster was averted by some quick reactions. Arline and I had Mark and Lynda in our dingy as we headed to town and a store. It’s quicker to dingy across the little bay and tie up at an old fishing station and then walk the rest of the way. With a full moon the tide was quite low. We were having an extreme jump onto the place we normally tie up so we decided to off load at a different spot will a little smaller jump up to land. We pulled up next to the spot, the ladies were seated, Mark and I were hanging onto the wall and Mark started to climb over the wall by grabbing onto the top of it. Well the cap of the concrete wall gave away and moved, a 200 or 300 lb piece of concrete was ready to fall 4 ft onto him, into the dingy, or who the hell knows what it would have done. In a split second I screamed PUSH! He pushed on the moving concrete and I pushed on the fixed wall. We were able to push the dingy away from the wall and at the same time he was able to hold and push the monster piece of concrete away from us and it landed in the water missing the dingy and us by inches but soaking everyone when it hit the water. But no one was hurt! From start to finish it was 2 seconds of pure fright, Mark and I thought and reacted as one. He got the brunt of the water, and all of our thanks. That really could have been ugly if it landed on him or bounced into the dingy. Mark is a retired firefighter and quite the fit guy. I can’t imagine if he wasn’t there, sharp and fit as he is. We could have all been hurt.