Easy situation puzzles

Four college students were late for a lecture and explained it to the lecturer by having a flat tire. The smart lecturer quickly proved to the rest of the audience that the latecomers had lied. How?

A man looked out of the window and soon died. What happened?

In the 1940s, a real football game in Brazil ended with an unusual score of 0.5 - 0. What happened?

He was very calm. However, they kept beating him until he screamed. After that, she was happy. Why?

Why is it better to have round manhole covers than square ones?

There are a man and his son in a car. The car crashes and the father dies. When the ambulance takes the son to the hospital, the surgeon says:" I can't do the surgery, because he is my son". How can that be possible?

Tony ran out of the building, carrying two bags. Another man ran after him, shouting and waving knives.

A man and a woman got married. After the wedding they abandoned all their activities, that were bringing them money, and only had fun. As a result, in three years they became millionaires.

In the middle of the ocean is a yacht. Several corpses are floating in the water nearby.

A man dies of thirst at home. How could it happen?

A man walks up to a cactus, looks at a piece of paper pinned there, and kills himself.

Visitors to a scenic mountain village were often amused by the village idiot. When offered a choice between a shiny 50-cent piece and a crumpled $5 bill, he would always happily choose the half-dollar. The bill was worth ten times as much, so why did he never choose it?