On June 18, 2008 Mike Hollingshead from "Extreme Instability" documented the advent of the weirdest storm: giant waves of rolling thick fog, cresting over the landscape….Similar weather phenomenon, according to witnesses, happened in England (Penzance, Cornwall) – perfectly defined, very slow moving wall of the densest fog ever seen. Here is another bank of thick rolling fog – this time at Rock Mills Rd. in Rappahannock County, Virginia: