yeah we had a pretty gnarly storm where i live a week or 2 ago. no vid as i live in a hollow so cant see out but was watching the lightning flashing. the thunder was not matching the flashing. 4-6 booms per flash at times. ground was shaking slightly. ground never shakes. i am around 200' below the main highway and the rest of the surrounding land mass, mostly bedrock. this is something that is for sure. thee is a large series of tunnels in this area. that is known by everyone, not conspiracy theory. known fact