Turn One:

Infernape holding King's Rock uses Flamethrower. Crits, flinches, and burns.

Turn Two:

Same thing happens. just crits and flinches because burn has already happened.

Well, here are the probabilities for each of these things happening.

So now we multiply them.

1/16 1/10 1/10 1/16 1/10 = 1/256,000 or 0.0039%

So the chances of this happening are less than 1 out of 10,000. So don't count on it.

Hope I helped!