Hey Guys I've owned my 24" imac for just coming up to a year this month. Model before current 27" model. When I woke up this morning I found in the lower right corner of my imac this STEAM/SMOKE behind the GLASS! I was like WTF! I wiped the front of the glass thinking it was on the front but then discovered it was behind. I took some photos and unplugged the imac and went to work. Ive now arrived home and discovered it has gone but am concerned if it might return or even worse worried my imac might catch on fire. What do you guys think? Has anyone seen this before?