Has anyone experienced the narcissistic stare?

https://narcsite.com/2017/01/07/the-stare-2/

It's incredibly creepy. This would happen especially when I avoid being isolated by her and sit close to other people.

I've gone almost-no-contact with this person (no more calls, texts, emails) but have no choice in bumping into her from time to time. I try to stay at a distance and busy myself talking to other people so I would never be alone with her, but when I turn around, I find her staring.

How do you handle it? You can't control her actions but how do you not let it bother you when you get that creepy feeling of being watched?