A woman with multiple sclerosis has shared a video of herself experiencing a "terrifying" 25-minute seizure.
In the video, which lasts 27 seconds, the youth worker and assistant football coach shakes violently on her sofa with no control over her body.
Writing in the caption, she said: "These 'attacks' are brutal and are completely draining - I won't let it beat me though."
She said she filmed her seizure to show to her neurologist, but realised that it was a powerful way to show the "not so invisible side" to her illness.
Moments into the eye-opening clip, the camera falls to the floor but, according to Langwine-Cooke, her fit continued for almost half an hour.
Multiple sclerosis is a neurological condition which affects around 100,000 people in the UK.
The complex condition has an array of symptoms which can include vision problems, balance problems and dizziness, fatigue, bladder problems, stiffness and spasms.
It can also affect a person's memory and ability to think properly, and can impact emotions.
Speaking about her illness in a separate video, Langwine-Cooke said that the attack was quite a length of time for her body to be going through something so "stressful".
But said that it isn't the longest seizure she's experienced, with past spasms lasting anywhere between one and three hours.
She added: "It’s terrifying not knowing if the next one could be the one that causes me to never walk again. Could the next one be the one that leaves me in a coma? Could the next one be the one that kills me?"