NOTE to new or soon-to-be RJ Pilots: You MUST MUST MUST read and understand high-altitude aerodynamics!!! Most regionals absolutely blow this stuff off because it is over the heads of many of their ground instructors! This has gotten a little better since pinnacle, but it's still bad at some companies.

There are RJ's STILL falling out of the sky (post-pinnacle) due to complacency brought on by a failure to appreciate the operating environment...it really is different at FL390!!! Typical event involves a high-altitude stall due to climb/ airspeed mis-management resulting in an extreme vertical rate, zero G, and loss of 5K-10K feet. Every seat cushion in the back will need to be replaced (and maybe the front too), ATC will violate your @ss, and you better hope you're not on probation...