When I noticed my friend and I were in a critical situation — swimming alone far from both edges in a deep lake — I was scared. In the Spring of 2017, after a short rain, my friends and I ruled to hang out in Thetis Lake Park to hike and have a good time together. The original plan wasn’t to swim, but as the place is popular for swimming and having enough depth for big jumps, I decided to bring my swimsuit in case. The place is beautiful: boreal trees, huge rocks, transparent water. Facing this amazing scenery, I changed my clothes and entered the lake; the water was cold. At the same time, I invited my friend to jump in. After strong persistence, my friend finally got in. Then we dove together and became excited, and it made us feel like swimming across the lake; nearly 80 meters. Exactly in the middle of the way, my friend’s face got pale, and he stopped laughing. My friend had cramps and started to sink. I tried to help him, but my help didn’t work as expected, and we were about to sink together. In fact, we were alone, and our friends on land couldn’t help. Moreover, it had no people swimming near us till this moment. My friend was in a panic and I was scared. Suddenly, a couple of swimmers appeared in front of us, and I yelled for help. However, they didn’t respond immediately to our request. They thought it was a joke because our friends on land were laughing. With this emergency, the swimmers noticed it was very serious and helped us come back safely to the edge of the lake. Due to this scary experience, I realized we must think about safety for this kind of situation. It’s important to center over a plan B for unexpected events while we are swimming, for example, preparing one float device at least.