Opportunity
The time spent recovering was lonely, and Khan also felt restless during the first days stuck in the bed. He had trained every day in the last period, so being bedridden bored him. He could meditate freely, but he often found himself forced to sleep, which annoyed him due to the nightmares.
The following days went better. Khan came to terms with his situation and managed to make the best out of it. He had forgotten what it was to rest properly, but he slowly recalled it now.
The short interactions with the alien doctor and the long hours spent meditating allowed Khan to keep track of his recovery. His hands were the first to heal, and his shoulder and internal injury followed in the next days.