Sleep oddity
Have a browser open on your machine, with a number of pages open. Put your laptop to sleep (normal, default, out of the box, sleep, NOT hibernate). Put it in a bag, under your arm, wherever. Walk through some public wifi, especially one that has a sign-in or login page, with the machine still sleeping.
While still closed and supposedly asleep, my machine will actually see the wireless network, and the login in screen will be on the browser pages when I wake the machine!
Similarly, I've put my machine in my backback and when I take it out it is extremely hot, and the battery is rundown, even though it had been put to sleep fully charged.
It's as though my machine is only partially asleep.
This is one of the reasons I've opted to use the Hibernate system preference, to force my machine to go into a deeper sleep. When I do this, it never has the above problems, not surprising.
And please don't be too quick to jump on the "you must be a new user and don't know what you're doing". I was an SE for Apple for almost 10 years, and have had one of almost every family of apple laptops since they were first introduced. So, I'm not exactly a newbie.
MBP 17 2.16, Mac OS X (10.5), another victim of keyboard freezing