We’ve seen it many, many times: the ship gets into a firefight, takes a few hits, shakes around, and consoles explode (possibly taking an unfortunate ensign with them). Eventually the battle is resolved with our heroes largely intact if somewhat shaken up. If it was a particularly nasty battle, there will be signs of damage: scorches on the walls, deformed equipment, busted lights, and rocks scattered about.
All of that seems reasonable… except the rocks, which look pretty out of place in a spiffy 24th century starship. So why are they there?
Ah, you’re talking about the ROCK-E system: Rapid Overload Conversion to Kinetic Energy. It’s a safety feature. When the consoles are damaged, the exposed EPS connections would naturally send out highly energetic plasma arcs, killing anyone nearby. Instead, the safety mechanism automatically converts that energy to harmless matter and ejects it from the console.