Last completion block not called.

gistfile1.m

- (void)perform {
    UIViewController *sourceController      = self.sourceViewController;
    UIViewController *destinationController = self.destinationViewController;
    
    UIView *destView    = destinationController.view;
    destView.alpha      = 0;
    
    [sourceController.view addSubview:destView];
    destView.frame      = CGRectMake(0, 0,
                                     CGRectGetWidth(sourceController.view.bounds),
                                     CGRectGetHeight(sourceController.view.bounds));
    destView.transform  = CGAffineTransformMakeScale(0.05, 0.05);

    CGPoint originalCenter                  = destinationController.view.center;
    destinationController.view.center   = self.originatingPoint;
    
    [UIView animateWithDuration:0.4
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         destView.alpha     = 1;
                         destView.transform = CGAffineTransformMakeScale(1, 1);
                         destinationController.view.center = originalCenter;
                     }
                     completion:^(BOOL finished){
                         [sourceController presentViewController:destinationViewController
                                                            animated:NO
                                                          completion:^{
                                                              [destView removeFromSuperview];
                                                          }];
                     }];
}