Good Riddles

Question: Two men are facing each other alone in a large room. There is a clock on the wall. One man, who thinks of himself as a prophet, says to the other, "In five minutes you'll be stabbed in the back."

The other man is very distraught and stares at the clock. After five minutes he is stabbed in the back.

What happened?

Question: I'm a measurement of time.
But you'll find me on a map, not a clock.

What am I?

Question: A man is found dead in a phone booth in a pool of blood. The glass on either end of the phone booth is broken and the phone is hanging. Just outside of the phone booth is a bucket and a stick.

What happened?

Question: 5 bricks construct me, you'll find a candle in the middle. I am the antithesis of heavy, Without me you couldn't read the riddle. What am I?

Question: No matter the shape I sit in, you'll find me in a row. Although my name has no letters, my initials are MNO. What am I?