This is the shocking moment a pit bull launched an unprovoked attack on a woman doing her ice bucket challenge.
The woman, who was not named, has two bowls of cold water poured over her head then screeches as her grandchildren laugh in delight.
Shocking: The pit bull caused significant
damage to the woman's face
But then a pit bull appears in shot and lunges at her, before sinking its teeth into the side of her face and dragging her to the ground.
Laughter soon turns to screams and the rest of the family are seen running to her rescue.
As one man grabs the dog, the grandmother can be heard saying: "Go and get me a towel," while one of the grandchildren screams that her face is bleeding.
The incident took place in America but the exact location is not clear.
It is believed to have occurred some time last year but the footage was revealed on Friday after being uploaded the woman's daughter.
Unprovoked: The dog appeared to attack for
YouTube user emaustin102387 claimed her mother wanted the footage to be shown as a warning to other pet owners.
She wrote: "This is my mom when she was viciously attacked by a pit bull last year during the ALS ice bucket challenge.
"She lived to tell the tale of it and didn't want this released until she was ready.
"This should serve as a warning to all pet owners. Unless you are going to take the time to make an animal a pet then it will remain an animal."
The daughter claims that the dog belonged to her sister, who kept the dog for breeding purposes and was not at the house at the time of the attack.
It was not mentioned whether the dog was put down.