I have a 2.5yo and a 6mo and went to visit a friend this morning.
Managed to get both kids bundled into the car in the pouring rain and returned 3 hours later to find that I had left the front door WIDE open 
Everything still seems to be in its place including my purse which is on a shelf by the front door in plain view from the pavement but it's given me a real fright!
There's no way I'm telling dh. He would go mental!