Michael J. Fox Falls Onstage at Back to the Future Fan Event Due to Parkinson's

Michael J. Fox fell onstage at a Back to the Future fan event in Philadelphia, unable to maintain his balance due to Parkinson's disease.
Though shaken, Fox was uninjured and continued participating on the panel with his co-stars.
Fox has lived with Parkinson's disease since 1991 and has recently shared that the symptoms have worsened over time.
Along with tremors and mobility issues, falling is a serious risk for those with Parkinson's.
Fox started a foundation dedicated to Parkinson's research that has raised over $1 billion to find better treatments and a cure.