Depends on the flake
Thin flake = all force on small area of nut = more likely to break flake
Thick flake = cam exerts more outward and less downward force = more likely to expand flake
You could always just run it out
In general, this question is more on the order of: if you are screwed, how bad are you screwed?
We can ask more like that:
If you are climbing Pipeline, and all you have are RP's, what should you do?
If you are iceclimbing and drop both tools, 50' above your last screw, and 90' above the ground, with 30' to go to a tree, can you use your fingernails?
If you are accidentaly retrobolting DDD and get caught by Mitch Merriman, should you pray or run?
If you accidentally log on as Trask and find a new PM from minx in your inbox, should you a) open it or b) open it?