Good Samaritans waded from shore a few hundred yards away to assist grounded craft. Just an hour before a very low astronomical tide, a small cigarette boat passed under the causeway bridge. Some people on the bridge warned the skipper that the water ahead was too shallow, ignoring their warnings he gunned the engines and sped off and quickly ran into a sand bar. The impact created a big splash of water and sand. Some local boaters tried to pull the craft of the sand bar with no luck. TowBoat US Boat 4 arrived on scene and liberated the vessel shortly after 330PM.