https://www.polygon.com/battle-royale/2018/9/19/17880130/fortnite-cube-loot-lake-bounce-purple

The Fortnite Cube, which has been rolling around the map for the last several weeks, has finally come to what looks like its final resting place: inside of Loot Lake.

As Fortnite fans who have been following the path of the Cube know, Loot Lake always seemed like the destination, but I’m not sure that anyone expected it to end up like this. As long as the Cube was in the regular game world, it had a few interesting effects on players. For one thing, if you shot it, the Cube would push you away and damage you; if you stood close, it would regenerate your shields; and, most importantly, if you jumped on it the Cube would bounce you up into the air. While most of these properties left the Cube when it covered/was absorbed into Loot Lake, the bounciness is certainly still there.