Never carry your MBP in sleep mode

Little story to tell you.
Yesterday I went to my brothers and decided to take my 2.8Ghz 15" MBP with me.
Its in a speck case with a Moshi keypad cover. I slipped it into my Targa laptop case and off I went. What I didnt realise was I had left it in sleep mode.
After being over my brothers for about 3 hours I grabbed the Targa case to get the MBP out... Wow it was really hot. I quickly unzipped it and the MBP in side was extremely hot with the fans running flat out. I reckon I could of fried an egg on it no joking. I mean the whole thing was very very hot and no response from it. The poor old Moshi cover was like melted plastic.
Any way I popped it out the Speck case and put it on a cool surface. The flashing sleep light was off and all seemed dead apart from the fans howling.
After about 2 mins I pressed the power button and up it came. It cooled very quickly and the fans soon stabilised back to normal. The battery was at 5% and was fully charged when I left home.
All seems well now.
My advise is to never travel with your MBP in sleep mode and also remember that a Moshi Keyboard skin stops the heat dissipating as does the Speck case.
So you guys who are worried about a 100 degrees temperature, thats peanuts against how hot mine was.
Carlo

I don't agree with this advice. I routinely carry various Apple laptops in sleep mode, only shutting down/restarting every couple weeks. I go on long-distance trips this way, never shutting down during the trip itself.
I'll tell you what the advice should really be: When you close the lid, wait until the sleep light begins to pulse. If it does not, you know that it has not successfully entered sleep and you need to find out why.
Yes, there can be a problem with the pre-unibody MacBook Pros (I'm typing on a 2008 model right now) where the mechanical latch releases while the laptop is inside a case and it turns on and heats up in the enclosed space. To minimize the possibility of this happening, I have turned off the "lidwake" feature, which you can easily do as described here. If you do this, after opening the lid the Mac won't wake up until a key is pressed.
The new unibody MacBook Pros are unlikely to pop open in a bag, because their spring loading works the other way, to keep the lid closed. You really have to yank them open.

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