The phrase "catching act" can be interpreted in a number of ways depending on the context. However, the antonyms for this phrase may range from indifferent and passive behavior to a lack of ability to understand or participate in the action of catching. One could use antonyms like unnoticed, unremarkable, unobservant or laid-back to describe individuals who are not actively engaged in the "catching act." Other antonyms to consider may be inept, clumsy, or inadequate, which convey an inability to perform the catch successfully. Ultimately, the opposite of a "catching act" would involve a lack of attentiveness or an inability to execute the task at hand.