He sees the man lying there and takes pity on him. He helps him up, he takes him down the road and hails a taxi and takes him to the nearest hospital where he pays for his treatment in advance and promises to return the next week to check on him and cover any further expenses he might have. It just wouldn't happen like that. Yet that's exactly the sort of situation that Jesus describes. Now let me suggest that Jesus removes two common excuses for love in this parable and then in fact turns the whole question itself on its head.
Some people read the law of love in the reverse sense.
That is, if I don't hurt anyone by what I do, then it's as good as loving them. No doubt that would have been the response of the priest and the Levite in this story. I mean it would have been foolish to stop. There wasn't much they could do for the man anyway. He was already half dead.