Quoted from LesManley:

This one hit me last night and was super satisfying. I really noticed it, because I had the MB down to only a couple of balls so it stuck out more instead of being buried in all the normal chaos. On JJP Pirates when you start Dead Man's Chest MB, all the standups are lit 2-6. The standup you hit first is then the number of jackpots required to light the SJP. So once that number of jackpots are made, the chest then lights up like a runaway to shoot the ball into. When you shoot it into the chest, it goes around and is stopped by the up post above the upper left flipper. Now, with another ball you have to shoot that up post to knock the ball back up and then down through the chest for a SJP all in a small amount of allotted time. It's really not easy to do since it's only in a MB so other balls and the upper flipper often block your attempts, but it's a really neat shot and super rewarding when you can make it happen and it has some nice fanfare in the game for doing it.