I remember running along Merewether Beach in Newcastle with a mate about 25 years ago. It was just after a storm and there was still dark cloud and mist. I looked over at him and his hair was standing on end! He looked at me at the same time and saw mine was too - we both had hair in those days! As we ran along it slowly dropped. So then we turned around and ran back and at the same spot up it went again. We thought it funny but later learned that it meant "strike imminent" Lucky/silly us!
Richard