I was doing some intense surfing w/ up to 40 tabs on the go in Safari....I know that was taxing on the machine so no surprise that the fans were going....almost max at around 6k... But then after quitting Safari I noticed they were still quite high so I decided to check on things in iStat Pro....I was shocked to see the CPU "user" was around 60% and I had no programs open whatsoever....the fans were still over 4k. Pretty sure the memory hadn't freed itself up as well. I decided to restart and everything is back to normal. The "user" bounces between 2 & 4% and the fans are just shy of 2k. My only concern is that it took a restart to return everything to normal; usually quitting programs frees up the ram and calms the system down. Not this time... At first I thought it was Time Machine causing the issue but it wasn't backing anything up. Anything to be concerned about or does this happen from time to time on other people's MBPs?