WATCH: A small plane plunges into the ocean just off a crowded Boca Raton beach as stunned witnesses watch from the sand. Moments later, a lifeguard races into

WATCH: A small plane plunges into the ocean just off a crowded Boca Raton beach as stunned witnesses watch from the sand. Moments later, a lifeguard races into the water and helps the pilot safely back to shore. Police say the pilot was the only person aboard the single-engine aircraft and no one …