The phrase "being on the scene" implies being present and involved in a particular situation or event. Its antonyms would suggest the opposite, such as being absent or uninvolved. Other antonyms for "being on the scene" might include disengaged, distant, or detached. These terms suggest a lack of connection to the situation or event, as though the individual is emotionally or physically removed from what is happening around them. Some additional antonyms might include oblivious, unaware, or ignorant, which further imply a lack of engagement or knowledge of what is happening in a given situation.