I was doing some really light browsing, I had only Chrome running with 2 tabs open but I noticed my mbair was running unusually hot, 80 deg celsius and the CPU was only 40% idle. I quit chrome and made to log out and then back in but when I pressed Log Out chrome suddenly opened again (the light under the icon in the dock came on) and wouldn't quit. I looked in Activity Monitor and it said chrome was using about 100% of the cpu, I force quit it and after logging out/in everything was fine. I think this is just a random one time thing but was curious as to what happened 