Unai Emery apologised to Brighton supporters after booting a water bottle into the crowd during Arsenal's 1-1 draw at Amex Stadium.
The Spaniard kicked the bottle and it flew up, glancing off one fan, to Emery's immediate regret.
Brighton fans surrounding the incident reacted furiously but to his credit, the Arsenal manager apologised straight away.
He also walked over to the section of supporters in question once the full time whistle had been blown to express his contrition once again.