HashSet<Body> nuke = new HashSet<Body>();
// Traverse the contact results. Destroy bodies that
// are touching heavier bodies.
for (int i = 0; i < getPointCount(); ++i) {
ContactPoint point = points[i];
Body body1 = point.fixtureA.getBody();
Body body2 = point.fixtureB.getBody();
float mass1 = body1.getMass();
float mass2 = body2.getMass();