They obviously had a nice relationship, and his adoptive father was a selfless guy (after all, he died because he wanted to save the family dog from the truck). But still, Clark Kent could have absolutely went and saved his father from the tornado without being seen. He's Superman, after all!
Batman v Superman: Dawn of Justice
This movie is such a fever dream, most superfans choose to not remember it. In this particularly weird scene, Batman and Superman are dueling it out. Just as Batman is about to deal the final blow, Superman comes out with a plot twist.