It's 10 minutes to midnight. Build up to an unforgettable fireworks show despite your boss’s broken equipment.

 Not only could your sense of timing save your life, but you could save the Boss's business from going bankrupt (which means you get to have a job!)
Pick colors, explosion sizes, and firework patterns to add variety to the display and make the Grand Finale happen right at midnight... just time everything perfectly and it should be one of the best nights of the year for everyone there. 

P.S. The Boss is a good guy. A bit rough around the edges, but he's got a big heart, never yells, and even takes care of his employees' hospital bills... all around great guy.