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UIView Animation Blocks Crash in Instruments Only
CGRect frame = self.buzzMeBtn.frame;

frame.origin.x = 105.0f;
frame.origin.y = 200.0f;
self.buzzMeBtn.frame = frame;
self.buzzMeBtn.hidden = NO;
frame.origin.y = 120.0f;
[UIView animateWithDuration:.15f animations:^(void){

    self.buzzMeBtn.frame = frame;
} completion:^(BOOL finished){

    // Define the three stages of the animation in forward order
    AnimationBlock makeSmall = ^(void){
        self.buzzMeBtn.transform = CGAffineTransformMakeScale(0.6f, 0.6f);};
    AnimationBlock makeLarge = ^(void){
        self.buzzMeBtn.transform = CGAffineTransformMakeScale(1.15f, 1.15f);};
    AnimationBlock restoreToOriginal = ^(void) {
        self.buzzMeBtn.transform = CGAffineTransformIdentity;};

    // Create the completion blocks in reverse order
    CompletionBlock shrinkBack = ^(BOOL finished) {
        [UIView animateWithDuration:0.2f animations:restoreToOriginal];};
        //[UIView animateWithDuration:0.2f animations:restoreToOriginal completion: reenable];};
    CompletionBlock bounceLarge = ^(BOOL finished){
        [UIView animateWithDuration:0.2 animations:makeLarge completion:shrinkBack];};

    // Start the animation
    [UIView animateWithDuration: 0.1f animations:makeSmall completion:bounceLarge];
}];