When superfit Andrew Dean-Young left the house for a jog, he had no idea he would end up in hospital minutes later.
The physiotherapist was part way through his usual run around Cardiff beauty spot Roath Park when he suddenly collapsed.
"I had planned to run up one path and then work my way back to my house," he said. "Then my memory stops."
Shocked passers-by stopped to help and called an ambulance.
"The next thing I remember is waking up on a completely different path," he added. "I was then assisted into the ambulance and whisked off to the local hospital."
After being told he had a seizure, doctors carried out a range of tests - before a CT scan found the cause: a growth on the front of his brain.
And there was further devastating news to come for the 29-year-old - a biopsy revealed it was a a grade three tumour.
The news came as bolt from the blue for Andrew - who had not suffered any symptoms or warning signs.
"My head was spinning," he added. "I'd gone from feeling like my life was on track to suddenly having a large bump in the road."
A month after blacking out, the University of Birmingham graduate was on the operating table before starting gruelling radiotherapy and chemotherapy sessions.
Surgeons at the University Hospital of Wales, Cardiff, removed the stage three part of the tumour - but stage two areas remain.
Doctors have told him the tumour is "likely to come back".
He said: "I feel in limbo at present. I’m normally someone who tries to plan life out in advance, but at present - I am very much moving from scan to scan.
"It does make me worry and fear what will happen when I'm told the bad news that the tumour has started to show signs of re-growth."
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However, almost three years on from that fateful day in May 2016, Andrew still has plenty of fighting spirit.
While the condition means he sometimes struggles with his short term memory and occasionally forgets words, he is not giving up on his lifelong mission to help others.
He still works as a full-time community physiotherapist at Cardiff & Vale University Health Board.
"I am thankful for all the wonderful support from my family and close friends," he added.
"And I am also grateful that I can still go running as well as continue in my career - being a physiotherapist is what I wanted to do since I was 16."
Andrew now 32, also hopes that by sharing his story he can raise awareness about brain tumours.
The Brain Tumour Charity's chief executive Sarah Lindsell said Andrew was an inspiration.
"It will help so many others whose lives are turned upside down on a daily basis, to realise that support is out there and they do not have to face this alone."
More information about The Brain Tumour Charity is available via their website.
