Back in the very early 80's, maybe late 70's, folks on Whitney used a bass drum pedal pounding the bottom of their boats. Some guides would beat a heavy saltwater rod on top of the water to similate surface activity.
2 Thessalonians 1:6-10
In these verses, there are dire consequences for NOT obeying the gospel. What the world claims as "saved" isn't gonna cut it! Learn what it is, in an eye opening true story, "Muscle and a Shovel", by Michael Shank.