diff --git a/Rebel/CAAnimation+RBLBlockAdditions.h b/Rebel/CAAnimation+RBLBlockAdditions.h
index 151438a..71b2dd8 100644
--- a/Rebel/CAAnimation+RBLBlockAdditions.h
+++ b/Rebel/CAAnimation+RBLBlockAdditions.h
@@ -11,8 +11,9 @@
 @interface CAAnimation (RBLBlockAdditions)
 
 // A block called on successful completion of the animation.
+// This sets the delegate of the animation to be itself.
 //
-// This sets the delegate of the animation.
-@property (nonatomic, copy) void (^rbl_completionBlock)(void);
+// finished - Whether the animation had finished when it stopped.
+@property (nonatomic, copy) void (^rbl_completionBlock)(BOOL finished);
 
 @end
diff --git a/Rebel/CAAnimation+RBLBlockAdditions.m b/Rebel/CAAnimation+RBLBlockAdditions.m
index ae60236..e0bce00 100644
--- a/Rebel/CAAnimation+RBLBlockAdditions.m
+++ b/Rebel/CAAnimation+RBLBlockAdditions.m
@@ -14,17 +14,17 @@ static void const *RBLCAAnimationCompletionBlockAssociatedObjectKey = @"RBLCAAni
 
 @implementation CAAnimation (RBLBlockAdditions)
 
-- (void)setRbl_completionBlock:(void(^)(void))block {
+- (void)setRbl_completionBlock:(void(^)(BOOL))block {
 	self.delegate = self;
 	objc_setAssociatedObject(self, &RBLCAAnimationCompletionBlockAssociatedObjectKey, block, OBJC_ASSOCIATION_COPY_NONATOMIC);
 }
 
-- (void(^)(void))rbl_completionBlock {
+- (void(^)(BOOL))rbl_completionBlock {
 	return objc_getAssociatedObject(self, &RBLCAAnimationCompletionBlockAssociatedObjectKey);
 }
 
 - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
-	if (flag && self.rbl_completionBlock != nil) self.rbl_completionBlock();
+	if (self.rbl_completionBlock != nil) self.rbl_completionBlock(flag);
 }
 
 @end
diff --git a/Rebel/RBLPopover.m b/Rebel/RBLPopover.m
index 597c85d..8a848ab 100644
--- a/Rebel/RBLPopover.m
+++ b/Rebel/RBLPopover.m
@@ -228,7 +228,7 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
 	[self.popoverWindow makeKeyAndOrderFront:self];
 	[backgroundView updateMaskLayer];
     
-	void (^postDisplayBlock)() = ^{
+	void (^postDisplayBlock)(BOOL) = ^(BOOL finished) {
 		self.animating = NO;
         //[self.contentViewController viewDidAppear:YES];
         
@@ -244,7 +244,7 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
 		self.animating = YES;
 		[self.popoverWindow.animator setAlphaValue:1.0];
 	} else {
-		postDisplayBlock();
+		postDisplayBlock(YES);
 	}
 }
 
@@ -262,7 +262,7 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
     
     if (self.willCloseBlock != nil) self.willCloseBlock(self);
 	
-	void (^windowTeardown)() = ^{
+	void (^windowTeardown)(BOOL) = ^(BOOL finished) {
 		[self.popoverWindow.parentWindow removeChildWindow:self.popoverWindow];
 		[self.popoverWindow close];
 		self.animating = NO;
@@ -281,7 +281,7 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
 		self.animating = YES;
 		[self.popoverWindow.animator setAlphaValue:0.0];
 	} else {
-		windowTeardown();
+		windowTeardown(YES);
 	}
 }
 
diff --git a/RebelTests/CAAnimation+RBLBlockAdditionsSpec.m b/RebelTests/CAAnimation+RBLBlockAdditionsSpec.m
index 330411c..28910df 100644
--- a/RebelTests/CAAnimation+RBLBlockAdditionsSpec.m
+++ b/RebelTests/CAAnimation+RBLBlockAdditionsSpec.m
@@ -10,7 +10,7 @@ SpecBegin(CAAnimationRBLBlockAdditions)
 
 __block CAAnimation *animation = nil;
 __block BOOL completionExecuted = NO;
-__block void(^completionBlock)() = ^ {
+__block void(^completionBlock)(BOOL) = ^ (BOOL finished) {
 	completionExecuted = YES;
 };
 
@@ -24,7 +24,7 @@ before(^{
 it(@"Should have set a completion block", ^ {
 	expect(animation.rbl_completionBlock).toNot.beNil();
 	expect(animation.rbl_completionBlock).to.equal(completionBlock);
-	if (animation.rbl_completionBlock != nil) animation.rbl_completionBlock();
+	if (animation.rbl_completionBlock != nil) animation.rbl_completionBlock(YES);
 	expect(completionExecuted).to.beTruthy();
 });