I'm reading the excellent Isaac Asimov's "A choice of catastrophes" and I'm curious about a "mental exercise" (call it crazy fantasy, I don't care, it's fun and I have fun doing it, you should try it): "what if" a mini black hole (mass of an iceberg) "hit" the Sun? If it hits at a certain angle and velocity, it can be trapped by Sun gravity and goes to the core, and starts to devour our closest star. How long it will take to the Sun suffer it's own "big bang"?
In the core of the Sun, mass will be pushed to the mini blackhole (mbh, for short) by the pressure of the core, I'm right? So you have big pressure sending lots of matter into a small drain. Until some time has passed and some mass had absorbed, there's only the pressure. After certain time, the mass of the mbh is enought to accelerate mass by itself. More time, and the gravitational pull will be stronger than the pressure push, and sooner we will have X-Rays being emmited by matter that "falls" into de mbh (still a mini?). More time and the Sun "blows".
Is that a plausible scenery (forget about the extremely low probability of a mbh already hitting the Sun)? How long such catastrophe will take until the last act?