I remember jumpseating on a DC-8 a long time ago and had introduced myself to the F/E and F/O. The captain soon entered the cockpit and gave me permission to ride then he sat down in the left seat. The captain then introduced himself to the F/O and F/E and said " I am captain xxxx and I have 8,721 hours in the DC-8...dont touch a f..k.ng thing!" Nice way to start a 5 hour flight! Needless to say not a word was spoken outside of required talk all the way to destination.