Final answer:
Without additional text to provide context, it's not possible to determine the specific activity the narrator tries for the first time in the hospital. The references provided suggest experiences of care or confinement in medical or observation settings, but do not provide enough information to answer the question definitively.
Step-by-step explanation:
The question asks which activity the narrator experiences for the first time while in the hospital. Examining the provided references, none of them directly mention a specific activity the narrator tries for the first time during a hospital stay. Without additional context or a more explicit reference to the activity in question from the provided texts, it's impossible to provide a precise answer. It's critical to read the entire text to understand the narrator's experiences fully. A recurring theme in these references, however, is the idea of being cared for or observed in a hospital or similar setting. This suggests that a central question might relate to the experience of receiving medical care or being confined.