After he finishes playing around with the guard, he zooms the truck to the pipe/tunnel. However, how does he know how to remotely maneuver the truck so precisely when based on his position & location, it's obvious he can't see the truck or the other side of the tunnel at that point?
shareHell, I'm not even sure why he'd need to use the truck since he was able to go outside and use the remote and the truck. Why not just walk out of there with the plutonium and call it good, skipping the truck altogether?
Boy, if this weren't where I put my signature, I'd really let you have it!
Umm, I guess you failed to notice the radiation detector alarm at the entrance to the lab. The one that says NO RADIOACTIVE MATERIAL BEYOND THIS POINT.. The one that goes off when he walks through it with the bomb..
That's why he couldn't just 'walk out with it'.