The orchestra are trying not to jump out of their seats. I had the privilege of seeing Status Quo live five times from 1976 to 2000. All their shows were magnificent! On one occasion they even upstaged Deep Purple, on the same night. I kid you not!
Highly trained classical musicians letting their hair down and getting on it with the Quo ! Who wouldn't ? ? ( @4-46 shivers down the spine moment ) It's music - no matter what type , it gets you deep ( er and ) down 😉 EDIT : ok , I could be wrong , but I have a sneaky feeling the Conductor was too scared to look over his shoulder ! 😲