Get the joint events from the last simulation. An event is produced by a Joint which exceeds either its PhysicsJoint.forceThreshold or PhysicsJoint.torqueThreshold. The PhysicsJoint objects returned should be checked to see if they are valid before accessing as they may have been deleted since this event was produced (see PhysicsJoint.isValid). Any change to the world state can invalidate this data so referring to this data afterwards may cause an unavoidable crash! It is recommended that you immediately extract what information you need and not directly reference the returned data. See JointThresholdEvent.