Burst.

I'm listening in parasitology lecture, typing quietly so as not to disturb my students as they ask questions about cutaneous larva migrans and Ancylostoma duodenale. I'm giving them a quiz in an hour. They don't know yet.

An acquaintance burst into my face as I was walking to class, beaming with the weight of something to tell me.
"Guess what, Jessica?"
"What?"
"I learned how Valium works!"
I know how Valium works.
"Really? How does Valium work?"
He fed me resting membrane potentials and chloride ions choppily, excitedly. None of it was coherent; I don't think I'd have understood if I wasn't already familiar with the concepts. My face was a picture of casual concentration, and he grinned in delight when he wrapped up the long-winded discourse.
"I just HAD to share this with you, because I knew you'd appreciate it."
"You were right. I did appreciate it."

And I did. Not because he told me something I didn't know, but because he knew I would appreciate his newly acquired scientific knowledge. It's a good reputation to have.