How have your children/grandchildr en embarrassed you?

The first year I let my children stay up for Midnight Mass at Christmas our parish priest decided for some unfathomable reason to give a long theological sermon rather than the short Christmas and the family one.
We were sitting in the front row and about 15 minutes in DD turned to me and said very loudly 'When is he going to stop? I am tired.' Afterwards several members of the congregation came up to say what a delight it was to hear her say what they had been thinking!

We were at a steam railway station when my DD aged about 12 went into the ladies, followed by her 6 year old brother. She came out saying "You go and get him mum - he won't put it down and he's putting it in his sock" I was intrigued, I went into the ladies to find him shoving the plastic tampon holder down his sock. "What on earth are you doing with that?" "It'll be good for building my models" he replied. No answer to that.

While in the local cinema my 9 year old wanted to go to the loo. The toilets were just outside the auditorium, I had two other children with me, younger, so said to him to be double quick. He didn't return, I was worrying and asked a man who had his son with him to please go and check. He came back with my son saying that he had unfortunately lost his trainer down the S Bend. My son had been trying to flush the toilet and stood on the seat, lost his trainer.