Okay, so you've had major surgery, you feel like a truck ran over you, people keep coming in and messing with you, you're in and out of consciousness, you keep throwing up, and you're only two years old!
So then, more people come in to take a chest Xray, which means you have to lie flat and be moved this way and that and it all really, really sucks ...
And then, because Mom has been assuring you that they're just going to take a picture of your chest, "no owies" -- when you hear the machine snap, you do what you always do when someone takes your picture. You smile.
(A really pitiful in all its bravery smile.)
And your dad has a look on his face that betrays that what he really, really wants to do is go crawl under the sink and bawl. Because he's strong and steadfast, but the no-fail kryptonite is your smile.
But he doesn't. He just smiles back at you and tucks your covers in.