I understand that on the B-24, the tail gunner had to crawl all the way forward to the bomb bay doors in order to bail out. I always think of that when I see pics like this:
or this 
You could not get me in one of those ball turrets. I think they picked little guys for that job.
I saw a program today about the bombers of WWII. It said tail gunners had the highest death rate.
I understand that on the B-24, the tail gunner had to crawl all the way forward to the bomb bay doors in order to bail out. I always think of that when I see pics like this:
or this