Little Johnny Is Taking A Shower

Little Johnny is taking a shower with his mother and says, "Mom, what are those things on your chest!?" Unsure of how to reply, she tells Johnny to ask his dad at breakfast tomorrow, quite certain the matter would be forgotten.

Johnny didn't forget. The following morning he asked his father the same question. His father, always quick with the answers, says, "Why Johnny, those are balloons. When your mommy dies, we can blow them up and she'll float to heaven." Johnny thinks that's neat and asks no more questions.

A few weeks later, Johnnys' dad comes home from work a few hours early. Johnny runs out of the house crying hysterically, "Daddy! Daddy! Mommy's dying!!"

His father says, "Calm down son! Why do you think Mommy's dying?"

"Uncle Harry is blowing up Mommys' balloons and she's screaming, "Oh God, I'm coming!"

Train Test

Tom is applying for a job as a signalman for the local railroad and is told to meet the inspector at the signal box. 
The inspector decides to give Tom a pop quiz, asking: "What would you do if you realized that two trains were heading towards each other on the same track?" 
Tom says: "I would switch one train to another track." 
"What if the lever broke?" asks the inspector. 
"Then I'd run down to the tracks and use the manual lever down there", answers Tom. 
"What if that had been struck by lightning?" challenges the inspector. 
"Then," Tom continued, "I'd run back up here and use the phone to call the next signal box." 
"What if the phone was busy?" 
"In that case," Tom argued, "I'd run to the street level and use the public phone near the station". 
"What if that had been vandalized?" 
"Oh well," said Tom, "in that case I would run into town and get my Uncle Leo". 
This puzzled the inspector, so he asked, "Why would you do that?" 
"Because he's never seen a train crash."