When Chudnofsky blew up Crystal Clear's club, he hid an explosive in a briefcase in which Crystal says "Hey man you forgot your briefcase" and then blos up. This references the opening scene in The Unbtouchables where a rival alcohol lord blows up a bar when a little girl runs out to hand him his briefcase, not knowing it contains an explosive.
Think about this, Kato. We've been completely wasting our potential. This city needs our help. We could be heroes! We will pose as villains to get close to the bad guys. That way, no one will suspect we're really the good guys. Will you come with me on this adventure?
This movie is based on the classic vigilante franchise that began in the 1930s as a radio serial. Over the years its popularity grew and it evolved. The Green Hornet then became a comicbook and then in the 1960s also had its own television series featuring Bruce Lee as the Green Hornet's sidekick, Kato. The Green Hornet is still a very popular character in comics and is published by various different companies.
Although the movie is relativly true to the comics it is a lot more modern and relatable than it's sometimes rather "retro" or "goldern age" type books.