She then sarcastically adds: “Do you know this part, the bum?” as the show’s two other presenters looked on uncomfortably.

The unnamed fumbler seemed to ask the model for permission to rub some more suncream on her leg and engaged in small talk in an apparent bid to ease the tension – before going for her bottom again and earning himself an immediate slap round the face.

The programme continues for a few moments – but Rayssa looked as if she’d rather be anywhere else and calls the presenter presumptuous.

He awkwardly tries to continue the demonstration as the model struggles to maintain a smile before she explodes as he touches her AGAIN where he shouldn’t.

Furious, she storms off the set after labelling him a “clown” and having to be separated as she threw studio objects and threatened to strike him again.

The incident happened on the health section of the Brazilian TV show.

Rayssa made no mention of it on her Facebook or Instagram pages, where she has built up a large following with a series of pictures showing her at work and play.

One social media user said: “Good on her. She was making sure she got respect.”