THIS video shows the hilarious moment a man "accidentally" flashes his girlfriend's mom during a TikTok challenge.

The viral challenge dares people to surprise their partner by walking up to them naked.

5 The video shows the man leaving the bathroom naked but only showing his feet Credit: TikTok

5 The prank is a viral challenge on the social app Credit: TikTok

5 His mother-in-law look terrified as he filmed her Credit: TikTok

Over the weekend, TikTok user @hxnkins shared a video of himself walking into his girlfriend's room after shower.

The clip, which has YMCA playing, begins with him walking out of the shower naked, with only his bare feet in view.

He walks through the bathroom and heads straight into his partner's room.

But as he walks into the room naked he finds his girlfriend cuddling with her mother on her bed.

His girlfriend laughs first but lets out an embarrassed shriek and covers her eyes while burying her head into her mom's shoulder.

The mother looks clearly shocked and can't stop gaping at her daughter's boyfriend.

The viral video ends with her staring at him with her hand over her mouth in shock.

The TikTok user captioned the video explaining how he was inspired by other videos he had seen on the app.

most read in news ‘STAY OUT’ Harry & Meg slammed for ‘interfering in US politics’ after 'vote out Trump' plea 'I WANT TO DIE' Girl, 7, tired of abuse from parents asks doctors not to 'cure her' VIRUS VICTIM Homeless dog found tied to tree with note saying ‘my dad lost job to Covid' 'MADE BRITAIN GREAT BY GOING' Meg & Harry told to LEAVE US by Trump adviser after vote plea Exclusive DEADLY DRIP Michael Jackson’s blood-stained IV drip auctioned off by singer’s cousin PLANE WRONG Jet passenger 'tells veteran with MAGA mask you should’ve died in Afghanistan’

The challenge started with a women surprising their boyfriends and husbands by greeting them completely naked and filming their reactions.

Many of the videos are filmed while men are playing video games or working from home.

The cringe-worthy footage has been viewed more than 17.2million times and thousands of people have commented on the horrifying moment.

"Please, please, please do not tell me that was her mom,"one person wrote.

"It was," he replied.

One TikTok user joked: "She looks like she just seen Godzilla."

5 He found his girlfriend with her mother Credit: TikTok

5 The clip has been viewed more than 17million times Credit: TikTok

GOT a story? EMAIL exclusive@the-sun.com