As you can see in the clip below, this mechanized pup is still going through some growing pains. There are occasionally places LS3 can't go, and it's still pretty noisy. It won't be jogging around the front line any time soon. However, the semi-realistic test run will help Boston Dynamics refine the 'bot and get it truly battle-ready. And besides, it's clear that the Marines are already warming up to their new companion -- they've affectionately nicknamed it "Cujo."

[Image credit: Sgt. Sarah Dietz, US Marine Corps]