Dang, I've never heard of anyone who actually _wanted_ that behavior haha, I've had so much wasted time in school projects where I thought something was running but it wasn't because I had selected text in cmd.exe haha.
Has happened to me quite a few times.
Ctrl-S may or may not end up stopping the program, depending on how much it's printing, and how much output buffering there is before it blocks on writing more.