I'm afraid there's no kenging your way out. When I went for my
vocational interview, a sargeant asked me if I wanted to go to
Commandos. I asked him if I had a choice, and he said no. I thought
that maybe if I had a bad attitude they wouldn't want me, so I said
"What the f*ck are you asking me for then?". The next week I got my
letter saying that I was selected. As it turns out, that attitude
was exactly what they were looking for.
I went for the inital pilot selection tests as well. A few months
before I got my red beret, some recruiter said that I passed and
asked if I wanted to report at PLAB for initial training. By that
time I was too close to the beret already, so I said, "Don't call
me, I'll call you" and hung up on her.
Anyway, if you are going into Commandos, welcome to the fold. Don't
go looking at it as being siong - you'll have plenty of tall
stories to tell over a beer by the time you're done! Keep your
cool, make a point to get right into the experience, and you will
be fine.