I hate posting "i have a friend this...I have a friend that..."etc. but along with my Army SF buddy, I do also have a long-time-no-see friend who was in the Navy and was SEAL 4 (he said the hardiest get SEAL 1), last I got a chance to talk to him and down some Bourbon with him, he told me that he was off to New Zealand to train with British S.A.S., that was a little before Desert Shield came rolling around and I have not heard anything from him since. He shared alot of what he had to go through, told me the physical demands were NOTHING compared to the mental toughness and determination that was needed to graduate...and then he began to elaborate on the physical demands and exercises that they had to do...all I can say is, they have got to be some Mentally tough sonsabreeches. He did say that after graduation was when all the real fun starts, he also said most SEAL who have actually seen combat or been involved in an action...will not even tell you that they are SEAL, said the loudmouths are the ones that just graduated, said "you learn to be low profile all the time, because that is your job...".
That said, he is still nothing compared to my Tempura Kimchee Ninja/Delta Force Commando-Special Operations Team Sniper training that I had gotten in my past life as the Emperor of Rome.