Completely disagree with the people who said Isla was attention seeking
Having studied psychology and mental health, her reaction was unfortunately very real. The level of hyperventilating, shaking and hysterical crying shows she can’t regulate her emotions and experiences a very heightened stress response. Without therapy, it will continue into adulthood and she’s going to be unable to deal with any form of stress.
At 5:40, you can see her realise that she can’t catch her breath and can’t regulate her breathing properly, and you can see the fear on her face while she tries to calm herself down and starts wringing her hands, before it quickly cuts away. None of her body language shows that she is happy or excited, it shows stress and anxiety.
Out of all the children, she worries me the most.