Gordon Ramsay reveals injuries from a "really bad" cycling accident.
Ramsay shows substantial bruising requiring hospital treatment on social media.
Ramsay emphasizes helmet importance: "Honestly, I wouldn't be here now."
Ramsay's Father's Day message: always wear a helmet cycling.
Ramsay shares before-and-after photos showing helmet's substantial damage.
Ramsay thanks Lawrence and Memorial Hospital's trauma surgeons and nurses.
Ramsay, bruised but without major injuries, describes it as "brutal."