"I"....would probably do exactly what this lady is doing, and thinking the killer is in the next county, run my errand, get my groceries or gas or whatever.
But if someone interviewed "ME", "I" would voice a tiny bit of regret that life had taken such a turn and "I" had to resort to this kind of subterfuge.
"I" am probably more prepared than you seem to give me credit for----although "I" still think it would be difficult to absolutely know how "I" would react in such an emergency.
There....is that better.
Yes it is.
You would share this potentially life saving tactic with your family members and friends though...
Right?