1. The ridiculed f/o was on an Alaska Airlines flight into a bush strip, where the captain got high and hot. The f/o kept hinting and outright saying that the captain (the PF) was screwing up. He was ridiculed by the F/E, who at one point told the captain, "Know the difference between a copilot and a duck? A duck can fly!" At one point he also said, "Don't worry, the fox has got it wired." I like to use this line when somebody is starting to mess it up.. .. .2. Never forget, the KLM F/O at Tenerife actually pulled the throttles back to idle once after the captain had advanced them. He just didn't do it a second time. I once attended a day-long CRM seminar on that subject - cases where a crewmember knew something was wrong, and even acted on it, but at some point gave in - with terrible consequences.