Driver was taking family on scenic drive down edge of Willapabay When he hit a buried rock and slid sideways over two large rocks . The tide was in so I couldn't get my wrecker to him . I used my snatch block and his winch to yank the rocks out from under the middle of his truck . We then cut a path in front of his truck so we could winch him out of the slop and up to hard ground . I was surprised that his winch performed as well as it did . I will try and post the brand of winch . It was one of the cheaper ones on the market but it performed well . Took us about an hour and half to ge tturned around and back to solid ground . I suggested to him he needs to carry chains and a snatch block or two .