When I come across people having a ‘situation’, I make no eye contact at all, unless I have to. Then, I keep a flat expression, so my exasperation or confusion doesn’t show and
‘challenge’ them.
Protip: Should you encounter a Bigfoot/Sasquatch/Skunk Ape do not make eye contact or bare your teeth in a smile.
Either is regarded as a challenge. Both together? You're going to have a very bad day...