Rocket Fuel

The pastor sees little Johnny sitting on the church steps. Little Johnny is fixated on something. The pastor looks closer and sees that Johnny is stirring up something in an old coffee can. He says, "What you got there little Johnny?"
"This here is turpentine, the most POWERFUL liquid in the world.", says Johnny. The pastor shakes his head, sits down next to Johnny and says, "Now you know that's not true son. Holy water is the most powerful liquid in the world. One drop of holy water on a pregnant woman's stomach and the next morning she'll pass a baby boy."
Little Johnny says, "Well that may be true. But one drop of this on a cats ass and he'll pass a motorcycle!"

Johnny Being Johnny

A young mother paying a visit to a doctor friend and his wife made no attempt to restrain her five-year-old son, who was ransacking an adjoining room. But finally, an extra loud clatter of bottles did prompt her to say, "I hope, doctor, you don't mind Johnny being in there." "No," said the doctor calmly, "He'll be quiet when he gets to the poisons."

Following the Sign

Teacher:  Why are you late? 
Little Johnny:  Because of the sign.
Teacher:  What sign?
Little Johnny:  The one that says, "School Ahead, Go Slow. "  That's what I did.