No matter how thick the walls are and how narrow the wicket is. A donkey laden with gold will always squeeze through.

Chief Wiggum: Listen up! (on gates with "Johnny D" on them) These prestigious wrought-iron security gates are bullet-proof, bomb-proof, and battering-ram resistant. Now-
Skinner: Then what happened to Johnny D?

Wiggum: He forgot to lock 'em.
The Simpsons, "Reality Bites"

OH WAIT!
We're fucking stupid.
It's concrete. We're gigantic death machines.

WIDEN THE HOLE!
Zeon Quest suggestion

Proverb

Sam: Look, it's the world's simplest maze.
Max: What's the big deal? All mazes are simple!

Sam: Not everyone has your knack for lateral thinking and heavy ordnance.