Updated

MELBOURNE, Fla. -- Three Melbourne teenagers were swimming in a backyard pool when they were visited by a stranger standing 7 feet tall and weighing approximately 1,500 pounds, MyFoxOrlando reports.

“We were swimming and the screen door was cracked open,” said Alex O’Brien.

That stranger was a 6-year-old brown stallion and retired racehorse named "Caper."

“We had a pasture set up right by the house, so he kind of nudged it with his nose came in,” O’Brien said. “I hopped out, grabbed it, tried walking it out, but it didn't want to go out. So it started backing up.”

According to the site, the horse, which is boarded on the 4 acres of land next to the O’Brien’s home, backed into the swimming pool, where it became trapped. Officials with the Brevard Zoo, a veterinarian, and the Brevard County Fire Department responded along with a hazardous materials team.

The horse was not injured and did not show signs of distress.

Click for more on this story from MyFoxOrlando.com