Why did the chicken cross the road, roll in the dirt, and cross the road again?
Because he was a dirty double-crosser!
Why did the dinosaur cross the road?
He didn't, because during the Jurassic period there were no roads.
Why did the duck cross the road?
To prove he was not chicken.
Why did the chicken cross the road?
To visit someone that is not very smart.
Knock, knock
Who’s there?
The chicken!