Sims seem to get Uncomfortable over tiny quibbles like a less-than-tasty meal or a stray chip bag. Probably the first thing that should be Uncomfortable - being on fire - is Tense, for some reason. Coughing on the billowing fumes, in agony while on fire, covered in burn wounds represented by soot because this is a cartoony game - all of these sound incredibly painful, not frustrating like a hard day at work.
Also - you'd be pretty grateful to be alive after a fire, so I changed it to a Happy moodlet. Besides, if the fire was that bad, it would have left many things of yours burnt, and then you'd get Uncomfortable and Tense moodlets from the mess.
Note: The title is meant to be read as Dr. Chillgood creating a mod called "Fire Hurts!", not that the fires caused by Dr. Chillgood are painful. For one, Dr. Chillgood is a refrigerator and doesn't start fires.
