 Buffalo Bills safety Damar Hamlin made headlines last when he collapsed and went into cardiac arrest after tackling an opponent. The 24-year-old was rushed to the hospital and reportedly in critical condition. The entire world watched the tragic event unfold, with updates of his improvements and recovery going viral on Twitter. Twitter: BuffaloBills Thankfully, Damar ... Damar Hamlin Posted His First Instagram Since His Cardiac Arrest... 