Wormhole

A wormhole is a special tile on a map that attracts ships and weapons. It will absorb weapons and will drop ships elsewhere that it sucks in. Different ships have different gravity settings so that some can be more resistant to wormholes than others.

You can change a wormhole's animation by replacing over5.bm2 withan LVZ. Also note the trick with wormholes used in Hyperspace.

See Physics for the gravity formula.