Teacher asks the student:
"What is your aim in life?"
"To become a psychiatrist", the student replies.
"Very good", the teacher says, "Now would you please spell the word psychiatrist."
After some hesitation the student replies: "Well, I mean I want to be a doctor, sir. D-O-C-T-O-R."
Crocodiles and alligators are surprisingly fast on land. Although they are rapid, they are not agile; so if you ever find yourself chased by one, run in a zigzag line. You"ll lose him or her every time.