Your child has a slight cold and has been whinging and having tanties since 5am despite endless cuddles and tlc. You're running on two hours sleep and after a ten minute high pitched shrieking match from said three year old because you encouraged him to move away from the tv for five minutes you finally lose it and yell at him like a cranky bish... Right at the moment your perpetually perfect, calm, serene and peaceful mummy neighbor steps out beside your adjoining fence. Just in time to see you acting like a cranky troll and your child burst into tears.
Can anyone top that?