Stevens was walking down the hall when he accidentally stumbled into you, but he manages to stay still, while you fall down.

As he looks down at you, he doesn't say anything, not even being rude to tell you to watch were you're going. He just stands in silence for some seconds

To make up for his lack of words, he pulls out his trombone and makes the cliché "Sad trombone" sound, after that, he gives you a snarky smirk