Yes, I noted that the tower wasn’t included inside the wall. It’s a little strange, and I have no idea why they did that, unless it’s to make the tower vulnerable to a truck crashing into it and set up the scene for a breach in the wall when the tower fell.
It would have made much more sense for the tower to be inside the wall.
Oh, well.
They do somewhat contrived things from time to time.
Next time you’re out and walking around, take note of how many dumpsters you see with sufficient space underneath to crawl under - even for a diminutive and very hungry Glenn.
On the other hand, let’s face it, biological activity on the cellular level is quite simply NOT possible without water and simple sugars, so there couldn’t be any zombies in ‘real life.’
Hey, it’s all for fun, so what the heck.
Or at least not until the body ran out of fuel, even if its own.
In that case, the zombie lasts hours and days at most if it can metabolize its own fat unless it eats.