Conor McGregor is being sued for throwing a Monster Energy drink (which are hefty) at a UFC press conference from August 2016 (video).
McGregor became agitated at members of Nate Diaz’s team and is said to have hit a security guard with the drink.
According to The Blast, William Pegg claims that he was hit in the back by the can, near his left shoulder. He also claims to have incurred medical expenses for $5,000.
Here is YouTube video of the incident.