While watching twitch just now, firefox informed me that adobe macromedia is running an unresponsive script. Of course the video playback was fine, so I selected continue and kept watching. It did it again in a minute, of course the video was again fine. I clicked stop script out of curiosity and flash crashed.
Oh I've seen so many instances of this... I have music players "crashing" on me that kept playing music up until I confirmed the error message. I recall even having a game that was playable up until I confirmed the message that it apparently died.