I broke a co workers brain by saying “this is just a job”

So a couple of days ago a co worker was trying to give me shit for going slow, I responded “ I’m still getting everything done, this is just a job, what are they gonna do, fire me?” Apparently that really upset her and she hasn’t come in the last few days, she’s still on the schedule so I don’t think she quit. The office gossip told me it has something to do with what I said. I’m a little proud of myself.