I had the same "levitating line" trick happen to me on Dalrymple. There was a storm in the distance (at least I thought it was still far enough away) and the line started to rise up. As soon as the line started lifting off the surface without any significant breeze, I was thinking holy crap, that's a charge building up and got out of there. I certainly have changed my thinking on how far away a storm needs to be....