It's the only time I've ever seen this and I wasn't planning it. We were camping in September of 2011 in S.C. and had gotten up early to see the sunrise. There were a couple of dozen turtles making their way to the sea. We kept the sea gulls and ghost crabs from taking any and watched them make their way to the water.
We were still on the beach when a ranger came out to check the nest. She had missed the hatching, but seemed relieved when we assured her that we had watched them make the sea. Here's one I managed to capture on video.