"Now listen, sons" said daddy hedgehog. "You're old enough to leave home and there are many dangers out there, the worst one being that busy road. If you ever need to cross it, but a car comes along before you get to the other side, just make sure you're standing in the middle of the lane and it will go over you without causing harm. Look, I'll show you."
The hedgehog went out to the middle of the lane and waited for an on-coming car.
"Here comes one!" he shouted. "Now watch how it ..." but that's all he had time to say before there was a sickening crunch and poor dad was flattened.
"Oh dear," said on of the sons, "I forgot to ask him about three wheelers.