Mom "Oh that's the dog knocking. I'll go let her in."
A moment later...
To the sound of our dog, Mandy, trampling through the house.
Mom "Oh My God! NO NOOOO!"
Me "What's wrong?"
Mandy found the remains of a wasp nest from last year and through it was a Frisbee. After calming mom down I assured her all the wasps would be dead at this time of year. And also that I saw it way up in a tree over the winter so there's no way anyone hit it with pesticide. Never the less we weren't about to let her eat the thing so we took it away from her pretty quick.