Oli Sykes of Bring Me the Horizon said he suffered a mild concussion after being hit in the head by a phone during Monday’s concert in St. Louis, Missouri. Footage of the incident shared on social media shows the 39-year-old British rocker kneeling at the front of the stage when a large smartphone launched from the crowd strikes him. After finishing the song , Sykes picks up the phone and says into the microphone: “Who the f*** just threw a phone at my f***ing head?” Sharing an update with fans Tuesday, the singer wrote on his Instagram Stories: “Alright everyone — just wanted to let you know I’m all good.…