human
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
At a zoo, there are two animal caretakers named Jane and Mark. They both take care of different animals: Jane looks after the lions, while Mark takes care of the giraffes. One day, Jane decides to surprise Mark by cleaning the giraffe enclosure for him. While she's doing this, Mark is taking a break and doesn't notice her. Later, when Mark comes back to check on the giraffes, what does he think happened to the enclosure? What does Jane think when she sees Mark's reaction? Provide a brief response.

### Response:
gpt
When Mark returns and sees the clean giraffe enclosure, he might initially be surprised or confused, thinking that perhaps he had forgotten that the enclosure was scheduled for cleaning or that another staff member had taken care of it as a favour or part of their job. Depending on the standard communication practices at the zoo, he could also assume there was a mix-up in the work schedule if caretakers sometimes help each other with tasks.

Jane, on observing Mark's reaction, is likely to feel pleased that she has successfully surprised him, assuming he is puzzled because he was not expecting the enclosure to be cleaned by someone else. If she notices that Mark looks happy or relieved by the clean enclosure, she would probably feel satisfied with her decision to help him out. However, if she perceives his confusion as concern or worry about unauthorized work being done in his area of responsibility, she might quickly explain what she did to reassure him.