Chris Stapleton's rendition of the National Anthem was quite emotional -- just ask the Philadelphia Eagles' head coach ... who was shedding literal tears during the song.
Nick Sirianni is going viral right now for his reaction during Stapleton's performance before kickoff Sunday at Super Bowl LVII in Arizona. The reason ... toward the end of CS's crooning, the camera panned to Sirianni for a close-up ... and the dude could be seen visibly crying.
His raw response to the moment is tugging at Twitter's heart strings -- as it seems many felt proud and patriotic while Stapleton carried everyone through the 'Star-Spangled Banner.