We have all heard about the character of the Joker, which some see as evil and should be wary of it, because it is distinguished by its strange behavior, a strange broad smile, and loud laughter that tends to giggle.
This type of laughter that we see in movies is a strong indication of the presence of evil within people, and also expresses the person's comfort and admiration for situations in which the other sees distress with problems, and he also enjoys harming those around him.
Ordinary people always trust what they hear and see around them. That is why it is difficult to fake our smiles and laughter in front of the situations and events we live in.