i would never stow it in the cab of my truck unless it was secured in some fasion. if you were to roll your rig you sure don"t need 20 lbs of iron flying around inside your cab.
same thing goes for tool boxes or anything else.
i'd like to introduce my self to the membership' my name is steve and i live in north dakota and am a retired firefighter. i enjoy woodworking and light mechanic work on my motor cycles.