One year, Johnny's family was having an "extended family" 4th of July cookout at their home. One of the special treats that year was lighting the fireworks (Roman candles, bottle rockets, missile batteries, etc.) they had bought out of state (they're illegal in their state, of course!).
Just before they were to arrive, a cousin called, saying his neighbors' plans had just fallen through and asking if he bring them along to the picnic -- they even had extra food to bring. "Sure, the more the merrier!"
When the cousin arrived with his neighbors, it was discovered that the head of that family was a police officer. Johnny's father turned as innocently as he could to his son and whispered to him to grab the paper bag of fireworks sitting in the kitchen and hide them somewhere quickly. Johnny disappeared, and the father changed the topic to food for the day. This family had brought some chicken to grill, so the father told them the gas grill was all set to use out back -- they just had to turn on the gas and push the ignition button with the lid still closed.
They headed out to the back as Johnny returned through the front door. The father hurried to him and said, "Whew, that was close! That man's a police officer, and he almost saw the fireworks. Did you hide them real well?"
"Oh, yeah, nobody will ever think to look in the grill!"