I remember when we had to pass our 18 meters exam when diving, I got so scared. That experience is still vivid in my memory. It is very cold, we are going deeper, and I realize I'm not in control of my descent speed, I feel like I'm falling, even though I'm not. The visibility below is low, it looks like a sandy whirlwind, a yellow cloud that I'm about to collide with that everyone disappears inside of. I enter the cloud, suddenly I cannot see anything or anyone. I hit the ground with my knees.