“Physically,” says Cruickshank, “all that’s required is you hang on and go for a ride. Mentally, it’s like playing chess against yourself. Its will and technique versus panic and pressure. It’s about forcing the mind to stop thinking. It’s about flow. If you can’t get into flow, if you can’t melt into the water, become part of the water, then you can’t freedive—there’s just no other way to go deep.”