A Tank
Tanks a lot for this beast of a machine...where does a person even stand? This thing is meant to cover long stretches of land safely and quickly, protecting those inside from any potential enemy attack. If they're hauling in this manmade weapon, chances are that you should get out of there...
Grenades
Would Bruno Mars catch a grenade for you if he knew this was what laid inside? This is an internal look at one of the deadliest devices known to man. It fits in the palm of your hand, but it also can wipe out a whole house in some cases. This machine is not one to be messed with under any circumstances.