Being friendly is the new black... or not.

On Monday I had late shift. One of the docs stood in the room where we prepare infusions.
I said: "Hey!"
and he was like: "YEAH! What is it this time?!"
and I replied: "Um... nothing, I just thought it would be nice to say hi and do not want anything at all from you. Not the usual: Hey, can you do this and that?.. Just nice and simple saying hello.
He looked at me like I'm a total nut.