Ok, this is not a real funny one as it was real and the flight it occured on crashed killing all onboard.
Last year during my Group Communication class as a part of my degree, we were shown a video on pros and cons of group work... in particular, the documentary was on pilots in cockpits.
There was a re-production of a MD-80 crash (no airline supplied), which hit the ground on speed coz of faulty altimeter readings - the captain thought they're higher when in fact they were so close to the ground... CVR readings were used in re-production.
So, the weather was shite and while descending the young Co-pilot noticed some inconsitency and several times tried to pinpoint to the Captain of the altitude... the Captain igonred him. "Nah... we gonna hadle it..."
Then the Flight Engineer sez to captain:
"Do you know what's the difference between a co-pilot and a duck??"
"What's the difference..."
"Well... a duck can fly..."
"Hah, yeah... good point..."
Minutes later they perished.
That was supposed to demonstrate how important it's sometimes to take in account the minority (co-pilot) in this case... there're age, experience and other issues in there. Sad story... I especially pity the co-pilot who died, but at least made attempts to save the plane, although was made shut up...