Oops, N-Fan seems to have split the scene; but forgive me, I like this idea too much NOT to use it. This is loosely based on my own experience in nursing homes--and no, I don't mean as a PATIENT!!
When with Mr. Heron again, Alipang said to him, "Sir, there's something I want to try with you if it's okay..." He looked at Mrs. Heron, who seemed prepared to trust him. Summer's father uttered a vague "Uh-huh, 'kay."
Alipang pulled off his shirt, exposing his vast array of old gang-torture scars from the Filipino slum he had been rescued from. He used the shirt to wrap up the rock, so its roughness would not hurt Nick Heron's palms. "Now, sir, please let me move your arms; relax them and I'll sort of pick them up; tell me if it feels bad at all."
Mr. Heron slowly nodded. So Alipang raised the man's left arm some inches above the wheelchair's armrest, gently turning the wrist palm-up. Setting the wrapped rock on Mr. Heron's palm, he put one of his own hands under that hand of Mr. Heron's, and with his other hand grasped Mr. Heron's arm near the elbow. Giving support at both points, Alipang slowly lifted the arm and the stone a few inches higher. "Does anything hurt?"
Mr. Heron shook his head and smiled. The smile did not stop when arm and stone were lifted still higher, then let gradually down. "So far so good, sir. Now, I'm going to raise and lower your arm this way for about a dozen times, with me still supporting all of its weight. If that much doesn't hurt you, next I'm going to loosen my support of your arm just a little, to see if YOU can hold up even part of the weight of the stone."
As it turned out, Mr. Heron was able to support part of the stone's weight for three lifts with his dominant hand, to twice with the other hand. "No more," he eventually said, but not sounding as if he were in distress.
"Okay, sir, I'm taking back my rock," Alipang told him. "It might be enough for now just to do more _moving_ up and down of your arms. We don't want them to be all stiff--not if we want you to be able to _raise_ yourself on them." And he pulled his shirt back on.