Could it possibly have been due to a series of impossibly low mangrove limbs that because of the high water were only inches above the top edge of our boat? Yes, indeed, we went under at least four trees like this that extended completely across the channel, as well as a low-hanging footbridge. And then got to repeat the experience on the way back. For now, trips through the mangroves are definitely not for sissies. We earned our gin and tonics that night!!! (Look again, now. All of those low-lying trunks of trees pictured were ones we had to fit under!