What are you doing?

Today I was puttering around in the break room making a lovely hot lunch for myself.

"What are you doing?" asked my new co-worker.

I was microwaving a plate of cheese, so I said: "Magic."

"Ok." Now imagine this being said in such a tone as to communicate that I am both completely cracker dog and a bit of a jerk.

"I'm making a toated cheese sandwich. I have to microwave the cheese and toast the bread seperately...."

"I see."

"Or they catch on fire- or so I hear..."

"Right."

'First impression, shmirst impression,' that's my motto.