Anchor diving
Anchor diving is the act of using an anchor to propel one towards the bottom of a body of water. More commonly used in lakes, it is performed by holding onto an anchor then jumping into the water with it. It is recommended to use a lifejacket, as it can be used to float up afterward and prevent drowning.
"Hey Lauren, let's go anchor diving!"
"Sounds great! I'll go get the towels!"
"Sounds great! I'll go get the towels!"