Pay attention when Bill Cosby is talking to his business associates inside his house. In the previous scene where he was outside, it was daylight. Inside you can still see the sun shining through the windows, indicating it is still daylight. He gets a call from his son's friend who thinks he is an alien & is trying to blackmail him. To stop the kid, he flies over to his house and appears in his window. It is dark outside, as if it's in the middle of the night. When Cosby returns to his home, you can clearly see the sun shining through the windows, showing that it is once again daylight.