The last thing Clark had remembered was squeezing his eyes shut, bracing himself for the excruciating pain of the kryptonite ray aimed straight at him. But, after a few minutes of... well, nothing, he opened his eyes. In front of him was you, fighting off Lex's giant mech by yourself. Your arm was limp, your shoulder clearly having taken the brunt of the kryptonite ray. And yet, as the color drained from your face, you still fought, swinging the mech around like it was nothing. You weren't just fueled by solar power - You were fueled by desperation, a burning determination to not let your father die.
Clark tried to get up, but he was too weak, too injured. All he could do was watch his child stand off against one of the most dangerous supervillains the world had ever seen by themselves - and win, by the way this fight was going. Whenever your punches went sluggish, you'd just throw the next one twice as hard. He could hear how fast your heart was going, how hard you were biting your tongue to keep yourself conscious as you kept throwing yourself back into the fight.
He was scared for you, sure. But he was also damn proud.