A sheep was in the field and it just vanished

How can that be?

We live in a large tower block, 10 floors high. My 5 year old son goes to school each day using the lift from the 10th floor to the ground floor. However, when he returns in the evening, he uses the lift to get to the 5th floor and then uses the stairs for the remaining 5 floors. Why?

What happens only in the middle of each month, in all of the seasons, except
summer and happens only in the night, never in the day?

If a peacock and a half, lay an egg and a half, in a day and a half. How many eggs can a peacock lay in three days?

There was a old man who lived by himself. He felt tired so he went into the bathroom, went to the toilet and then turned the light off before going to bed. The next morning there was a news flash on the radio that a boat crashed. The man opened the window and jumped out. Why?

If an electric train is going 150 miles per hour north and the wind is blowing the same south, which way does the smoke blow?