private void updateBonusBalls() {
Iterator<BonusBall> it = m_bonusBalls.iterator();
BonusBall b;
while (it.hasNext()) {
b = it.next();
if (b.isExecuted() || b.isOut() || b.isTriggered() || b == null) {
it.remove();
}
if (b.isTriggered() && (!b.isExecuted())) {
b.execute();
continue;
}
b.drop();
}
}
