A video has been released that shows just how fast lifeguards have to be when someone gets into difficulty in the water,
The footage shows a crowded pool filled with people on inflatable rings and rafts. In the sea of people, the sharp-eyed lifeguard spots a child who has fallen off his ring and is struggling in the water.
She jumps in and quickly gets the boy to safety.
Her fast reaction is very impressive - can you spot the child in difficulty as quickly as the lifeguard?
The video was uploaded to the Lifeguard Rescue YouTube channel as a training tool.
"I encourage you to use these videos as training tools to show new and returning guards what someone in distress or drowning looks like.
"I play these videos at trainings and go over common problems in our pools and similar traits our guests exhibit when they are in trouble in the water. I also use them to have the guards tell me when they would go in for a rescue. I get some really great reactions."