Re: avoiding ejections...
My ejection seat upstairs on the B52H model was a scary thing. You pulled the ejection rings upright on the ends of your armrests, then had to visually confirm the hatch above you had departed the aircraft, before squeezing the trigger levers in those rings to fire the seat. Otherwise, you could very easily eject into a closed hatch, which wasn't the best idea. Then, 1/2 second after the seat kicked you out of the airplane, another initiator kicks you like a mule in the small of the back to separate you from the seat. Supposedly, that 1/2 second was all the time needed to make sure you cleared the vertical stabilizer on the way back through the slipstream. If your seat malfunctioned and didn't fire, you could try initiating it a second time if altitude and airspeed permitted, otherwise you were to crawl to the nearest open hole created by a fellow crewmember's ejection seat and jump out with your chute and seat kit. Yeah, right.
At least it wasn't as bad as the guys downstairs. Their two ejection seats fired downwards through the belly of the B52. They had to make sure their ankles were firmly against the ejection seat bases, otherwise as they ejected they'd be missing their legs from the knees down. The aircraft commander's job was to yank and bank the plane in the event of the emergency, so that the bottom-firing ejection seats had some altitude, and were aimed in a horizontal trajectory, giving those guys some time for their parachutes to deploy. Sometimes, it wasn't enough.
A fellow B52 crew at KI Sawyer AFB in Michigan ran into trouble almost immediately after takeoff some years ago. I talked to the x-ray technician at the base clinic, quite by accident, several years after the fact. He said they x-rayed the bomb navigator's body while it was still in the bag. He knew it was the navigator because of the writing instruments, whiz-wheel, dividers, and plotter still in the pockets on the x-ray image. He also said that almost every bone in the deceased's body had been broken, some in several places, blunt force trauma as he ejected downwards into the trees and ground. I'm hoping he didn't suffer long.