A person runs differently when someone is chasing them. The klalla here is that we will need to run as if we are being chased without someone actually chasing us.
The obvious question then becomes: Wouldn’t it be a relief to realize that no one was in fact chasing us?
That was what I was answering. It will not be a relief. The klalla is that you will get maximum suffering (running as if we were being chased) with minimum kapara (since we were not actually being chased).
Hope that makes it clear.