I would also like this feature.
If I am running a script and I want to pause it, say, to check the output data that has been generated. If the data is correct, then I would continue where I left off. If not, I would interrupt the script.
Some of my scripts are quite large and take an hour or more to complete. If I could *manually* pause while it's running, I can save myself time by continuing when I know it is running OK. Otherwise, I risk wasting an hour by waiting for the entire script to complete only to find out I have to run it all over again. I hope this clarifies and amplifies the feature request.