Batman Arkham Origins Episode 20: Firefly

"Garfield Lynns was a pyrotechnic who worked as an FX Artist at Panessa Studios. That career ended after the studios went bankrupt after a financial flop from making The Inferno. The owner of the studios, Tomaso Panessa, was forced to fire Lynns to save money, but was killed by Lynns immediately afterwards, as Lynns spit nitroglycerine into Panessa's burning cigar."