Just make a point of unclipping one foot (the same foot every time) well before any projected stopping point or intersection and you'll have no further difficulties. Anytime you're slowing and < 5 mph is probably a good time to unclip. It'll become habit and you'll have no more stories.

It's not just clipless pedals either - I did it with toe clips once in the middle of a HUGE intersection in the left turn lane. I was laughing so hard I had trouble standing back up.