I wonder how many times the Master blew him up? He was awfully sure he'd survive *anything.*

I do think the Master had a lot of fun with Jack, once he realized what Jack was. I'm surprised Jack got out of "Last of the Time Lords" sane.

But then I remember he later survived two thousand years buried alive; I wonder what the hell sort of psyops training the Time Agency puts their agents through.

I'm sure the Master was absolutely sadistic with Jack. He knew he could be. *shrug*