It's a joke. The joke is that RSA seems familiar, comfortable. Except actually there's a bunch of super subtle ways to mess it up, like padding, or primegen bug

It's a joke. The joke is that RSA seems familiar, comfortable. Except actually there's a bunch of super subtle ways to mess it up, like padding, or primegen bugs. The bzzrt pop is just a reference to all of the exceptions and caveats, which all sound like arcane incantations instead of straightforward recommendations and are therefore no longer in this document.