Clumsy Brucie versus attentive Clark
Bruce "Brucie" Wayne tries to keep up his clumsy Brucie reputation at big events. Clark Kent happens to make the events surprisingly Brucie-proof, even if it's by accident.
The first time it happens, Clark happens to stand on the right place at the right time: Brucie Wayne stumbles from the stairs, but when he is about to fall down on the ground his hand latches on the arm of Clark Kent that keeps him standing. Both are surprised, but laugh it off with everyone around them.
It keeps happening. Clark prevents Brucie from falling backwards in a water fountain by bumping into him from the side. He also prevents Brucie from spilling his drink on shoes or the floor because he had his hand lowered, making Brucie's drink spill in Clark's glass. When Brucie ends the conversation to go to the bathroom and turns to walk in the wrong direction, Clark pats his shoulder as a goodbye, turns him around, and pushes him in the right direction.
People become used to seeing Brucie and Clark together. Bruce is confused by how Clark prevents Brucie doing something clumsy almost every time. Clark is confused by how Brucie seems to become clumsier and clumsier.