[mikebridgman]

Offroading isn't the only source of bumps - turbulence while flying, public transportation, strapped to a motorcycle on backroads...

I think the point is that when the computer is powered off and the lid is closed, there is absolutely no reason it should ever power on by itself.

[blahpro]

...unless there’s an external screen and keyboard connected.

[MaysonL]

Except to perform the "Power Nap" tasks in Mountain Lion. Maybe there's a connection?

[jerf]

My Dell Studio 17 won't. The power button is on the side on the hinge of the lid, and it will not power on if the lid is closed.