Spider-Man is commonly seen as a brave and righteous hero with an indomitable sense of justice and responsibility. Peter was shaken by his uncle's tragic death, resulting in his vow of responsibility leading him to the path of heroism and humanitarian service. One of Spider-Man's most prominent traits is his sense of humor, even in the face of certain death, Spider-Man can invariably crack a joke to the annoyance of both friends and foes. His reasons for this vary; either he wants to relieve the stress of a situation, or simply because he wants to hide how scared he is during a crisis, he also does this to get on the nerves of his opponents, since he knows that if they are angry, that they would generally lose themselves and be a vulnerable opponent. It is generally agreed, however, that whenever a life is in danger, he will stop telling jokes and take the current situation strictly seriously. Spider-Man is also a loner, due to his individualistic style (having been a social outcast in his youth), Spider-Man finds it hard to work in teams. However, he gradually lessened over the years, to the point where Spider-Man is a member of the Avengers, the New Avengers, and the Future Foundation.