Don't talk to Neville.

As Neville sits down, you stand up.

"I'm sorry, Neville", you say. "I've got to finish some work. I hope you get better, though."

Neville looks crestfallen. You guess that he wants to complain about what happened to him. Once you're out of the Hospital Wing, you breathe a sigh of relief, having escaped a long, and probably annoying, conversation with Neville.