Use reasoning to lead to the answer of the following question:
John and Joe like planning games but Joe was hit by a ball and fell down. What might have happened to Joe.
Options:
- anger
- good natured ribbing.
- enjoying
- injury
- enjoyment
 Reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
When one is hit by ball, it hurts them and they are injured. Injury can lead to one falling down. Therefore, the final answer is injury.