Worst movie interruption you've ever experienced?

You know how it is, you're watching a movie and something interrupts you.

It could be the phone ringing, it could be your dog barking, it could be your Mum saying food's ready etc

In your whole lifetime, what is one movie interruption that ruined a moment so much that it sticks with you to this day?

Example

"My phone rang the first time I watched The Empire Strikes Back during the I am your father moment"