I got into an argument with a friend of mine on how to handle a laptop while it's in use.
While it was running, I lifted it about 45 degrees off-horizontal to check out the ports on the side, and then again on the other side. He panicked and said using a laptop in anything but pure horizontal is a good way to destroy the hard drives.
I countered with the idea that since laptops are made to be portable, some tilting without excessive jostling would be well within the normal parameters of any decent design.
Long story short, I'm not allowed to touch his Toughbook anymore.
So now the question stands: What are the basic rules that should be respected in regards to using a laptop in order to avoid damaging it?