The problem lies in whether or not the drone tumbles in the free fall.
If it tumbles then there is a chance it may exceed the angles of tilt within which the drone will permit the motors to restart. So, if you are going to try it, be sure to start HIGH up over somewhere empty of people, property and animals.
Switch the CSC response mode to "anytime". Switch the flight mode cine (slowest flight speeds and lowest angles of tilt before the motors stop etc.) and put the sticks in the CSC position and hold them there. The motors will stop within either 0.7 or 1.7 seconds.
As soon and they stop release the sticks and let them centre.
Look at the screen to see if the drone is tumbling or apparently falling in a flat spin.
If it is tumbling then put the sticks into the CSC position and probably hold them there. If the screen shows the drone stop tumbling release the CSC position IMMEDIATELY and give the drone full throttle. If the drone continues to tumble then I do not know if it is better to try releasing the sticks and then put them back into the CSC position or just hold them in the CSC position and pray.
To some extent you can test what will happen by HOLDING the drone in your hand WITH A FIRM GRASP and wobble the drone to near 90 deg tilts WHILST holding the sticks in the CSC position. MAKE SURE you fingers, wrist and face will not be hit by the props. If the motors restart the drone will fight you, be prepared for this. You would do best to stop wobbling your hand, release the sticks and then hold the throttle closed, that should stop the motors after a second or so, if it doesn't then tilt the drone to 90deg or so. DO NOT release your grasp of the drone UNTIL the motors have stopped, there is no telling where it might go to if you release you grasp with the motors fighting you.
If the screen shows the drone to be falling level or in a flat spin then you are likely to be in a better position but restart the motors with the CSC position fairly quickly, the free fall speed is likely to be quite fast. If the drone was falling in a flat spin then a motor restart will stop the spin, release the sticks as soon as you see that happen and then give the drone full throttle.
The reason I suggest full throttle after a restart is because the motors may restart at idle and idle will not halt the fall. I had this happen with a Phantom 3 and it took me a second or so to realise what had happened. Incidentally the freefall speed of my phantom was, from memory, between 14m/s and 16m/s. I suspect the
Mini 2 is more intelligent than the Phantom 3 and may automatically throttle up but if it doesn't you need to know what to do.
If the
Mini 2 simply falls level I do not know how you will tell if and when the motors restart, you are on your own there.
Assuming you get a successful restart and regain control I would switch the CSC response back to "Emergency Only" or "Breakdown" ASAP, it is ALL TOO EASY to trigger and motor stop in "Anytime".
If you try this PLEASE post the flight log irrespective of the out come.