Which of the following is an example of aggravated assault?

Aggravated assault is typically characterized by the intent to cause serious bodily injury to another person, or by the use of a weapon or dangerous instrument. Hitting someone with an object clearly demonstrates the use of a weapon and an intention to inflict harm, which elevates the severity of the assault to "aggravated." This action not only involves physical aggression but also implies a significant risk of causing more severe injuries than what might be considered in a standard assault.

In contrast, the other options either describe actions that do not involve an intention to inflict significant harm (such as walking away after a fight or causing minor injuries without intent) or actions that may not result in any physical harm at all (such as merely attempting to threaten someone). These do not meet the legal threshold for aggravated assault as they lack the element of a weapon or the intention to cause serious harm.