Incredible footage shows an elephant rushing to the rescue of her favourite trainer, who she believed to be drowning.
The video shows elephant Kham Lha wading across the river at the Elephant Nature Park in Chiang Mai, Thailand.
Trainer Darrick Thomson, 42, says he has formed an "inseparable bond" with Kham Lha since she was rescued and brought to the reserve last year.
Darrick, who is originally from Toronto, Ontario, pretended that he had got into trouble in the river, splashing and crying out for help.
The footage shows the elephant going towards him as he moves towards the river bank on the other side.
When five-year-old Kham Lha reaches Darrick, she uses her trunk to try and lift him up before putting one of her legs around him.
Darrick is seen smiling as he peers at the camera while holding on to the elephant's legs.
He said: "Kham Lha was in a really bad way when she came to us.
"She had been tied up and forced to undergo cruel training known as crushing to prepare her to work in the tourist industry.
"We freed her and helped her to recover. She became really close to me and we formed a strong bond.
"I went in the river to show just how remarkable the relationship with humans is. And that if you show warmth and kindness to them, they will treat you well, too."
Crushing is a brutal training method where young elephants are tied up and beaten into submission.
The method is used in Thailand's elephant tourism industry to make elephants more subdued and safer for holidaymakers to ride.
After being rescued, Kham Lha now wanders freely through the protected jungle sanctuary with dozens of other elephants.
A spokesman at the Elephant Nature Park said: "We're all really pleased with Kham Lha's progress and how well she's adapted.
"She's now a happy young elephant. The video shows just how close she is to Darrick and it's an important lesson to be kind to animals."