Ive heard this is possible but IMO I cant see how someone can actually do this. If one uses just the end of a finger to put just enough pressure on the probe to slide it back until it stops, then hypothetically it should be impossible to puncture anything. I would think you would need to be rather forceful to get that to happen.

I certainly hope no one has ever kept pushing once the probe had stopped. I would imagine that it could cause irreversible damage to the snake. Maybe not life threatening but nothing I would want to happen. Why do you ask this question? Do you think you or someone you know has done this?