An encouragement to a divided jury to come to a verdict. It is also known as the "Allen charge" because such a tactic was employed for the deadlocked jury in the 1896 case Allen v. United States. Come on, let's give the jury a dynamite charge, in the hopes of getting all the jurors to reach a consensus.
dynamite
1. n. anything potentially powerful: a drug, news, a person. The story about the scandal was dynamite and kept selling papers for a month.
2. mod. excellent; powerful. I want some more of your dynamite enchiladas, please.