Final answer:
The provided texts do not describe John's specific reaction to Mark's taunting as he leaves school, but imply John may handle conflicts calmly.
Step-by-step explanation:
The question pertains to a fictional scenario where John is being taunted by Mark as he is leaving school. Unfortunately, the provided information does not contain a direct description of John's reaction to being taunted by Mark in this specific scenario. However, based on the character interactions mentioned in the various excerpts, it is implied that John is a character who may try to deal with conflict or aggression calmly, as indicated by the passage where he silences someone by calmly telling them where a key is hidden. In the absence of explicit information from the texts referencing John's behavior when taunted by Mark, we might infer that he would employ strategies that maintain his composure or attempt to de-escalate the situation.