         guard owner == nil else { return owner!.go(speed: speed) }
         guard speed > 0.0 else { return reverse().go(speed: -speed) }
         _speed = speed
-        postpone()
+        manual()
         begin()
         if position == 0.0 {
             emit(.Start)

        return AnimationGroup(animations: [self] + animations)
    }
    
    private func postpone() {
        NSObject.cancelPreviousPerformRequestsWithTarget(
            self,
            selector: Selector("go"),
            object: nil
        )
    }
        
    func complete(finished: Bool) {

            emit(.Completed)
        }
        _position = position
        if apply { manual() }
    }
    
    weak var owner: Animation? {
        didSet {
            if owner != nil {
                ongoingAnimations.remove(self)
                manual()
            }
        }
    }
