My mum always told me that she couldn't wait for me to have children...Not in a nasty way, she's lovely my ma 
Oh no, she wanted to sit back and laugh it up at the things my children said to me which made me inwardly bite my fist, as she had done when I was small.
So when I told her that DS1 (aged 3.5 at the time) had told the woman in Clarkes that I "kicked him often" (WTF?) she quickly told me of the day that I had "kissed" the rocking horse in Southwark Park and made my nose bleed - causing me to scream "I'm A BLEEDER! I'M A BLEEDER" all the way home.
The rest of my family remind me of the time when my uncle and aunt were marrying and I was a bridesmaid...The Vicar said something like "Lo! and as Jesus did attend..." and I piped up with "HE SAID A BAD WORD!!!! HE SAID JESUS OH VEEEEE!!!!!"
I was 25 at the time
Not really...
So, can we expand? Do you have terrible hilarious stories of your own awful faux pas as children?