Overview

• Michael J. Fox appeared on stage with Coldplay during their Glastonbury Festival set.
• Fox, in a wheelchair, played guitar on 'Fix You' and 'Humankind'.
• Chris Martin credited 'Back to the Future' for inspiring Coldplay's formation.
• Fox described the experience as 'mind-blowing' and thanked the band on social media.
• The performance highlighted Fox's enduring influence and ongoing battle with Parkinson's disease.