What Was Your Parents' Most Embarassing Moment?

We've all done or said something when we were kids that  completely horrified, mortified, and humiliated one or both of our parents.

Now, as parents, it's our turn. But remembering our own slip-ups is one way to prepare.

Here's my story:   

My mother happened to be a particularly small person. That included her chest, about which she was very sensitive.

In the 70s it was all the rage for women to “burn their
bras,” and so my mom did!  And, well,a 4-year-old really shouldn’t know that kind of information; especially one as precocious and talkative as I was.  

Mom and I were on a packed bus heading back to where she
was living, and I was chattering away with some older lady.  At some point the lady made a comment or asked a question that prompted me to say quite loudly “well my mommy burnt her bra."

We were two stops from where we needed to get off, but Mom was so mortified that she grabbed me and dragged me off the bus.

Of course I had no idea what I had done.

How would a 4-year-old know that it was inappropriate to share that kind of information on a packed bus?

Do you have a memory like that? Or maybe your child's done something like that to you?

Tell us in comments.