This is actually the second Helen Hunt movie in which Hunt plays a married woman involved in an extramarital sexual relationship with a paralyzed man; the first was The Waterdance, released in 1992.
Mark O'Brien: [lying in iron lung]
Breathing. Look you. This most excellent canopy, the air, presses down upon me at fifteen pounds per square inch. A dense, heavy, blue glowing ocean, teasing me with its nearness and immensity. And all I get is a thin stream of it. A finger's width of the rope that ties me to life.