One Piece Episode 446

[Assertn]

Level 2 proved to be more than enough for Buggy an Mr. 3.
Level 4 proved to be more than enough for Luffy and Mr. 2.
Level 6 proved to be more than enough for Luffy, Ivankov, and inazuma.

Honestly everyone is shocked by how Luffy got this far, but once the big guns came out and the riots break out at level 2, level 4, and the main entrance simultaneously, you have to presume that its all downhill from there. Do you think any prison in the real world can contain a riot of the combined force of all its prisoners?

Edit: Plus, I still think The Great Gaol lived up to its name. It took a series of lucky breaks to get Luffy to where he is now. By all accounts, he shouldn't have even found his way past level 1, let alone survive Magellan's wrath. This is the falling-action phase of the arc, and is mostly setting up for something far greater.