"Luckily, five years of experience in watersports and a good portion of self-control and composure have helped me to literally find the way out of the tunnel today."
Good for you, I can't even swim.
I tried to learn it with a trainer (or trainers), when I was a kid (in elementary school), but I couldn't learn it.
I am glad you are survived this and you are good!
I wish all the best to you!