From reports the initial impact created a very loud noise inside the pub - loud enough to stop the band playing - as well as a partial ceiling collapse and I guess there was a bit of a stunned silence until somebody made the joke about the band bringing down the roof, after which they all just carried on as if nothing had happened until the roof fell in. Yet common sense would indicate that something pretty serious had happened to the building's structure, even if nobody would have imagined a helicopter crashing on it; perhaps a lightening strike or a roof beam giving way. It's a shame that nobody had the presence of mind to shout: "Everybody out - move - NOW!". It might just have reduced the human cost of this tragic incident.