If the accumulation of this substance can be prevented, it may be possible to slow or halt progress of the disease.

But if you expose cells to chemicals or radiation, cut off their oxygen, infect them with a virus, or trigger some other immune response, p53 levels rise to halt progress.

Making a wrong choice will simply halt progress or return you to the previous scene to try again.

But behind the scenes halting progress was being made.

It has halted progress down one path and started proceeding down another.