Hag reflex
When you see an old lady who smells like a damp sock and looks like she just fought a war with a toaster. It hits you like a punch to the gut and a sneeze at the same time.
I walked into the grocery store and saw her. I turned around and walked back out.
My uncle screamed like a girl when he saw her at the family reunion.
I got the Hag Reflex so bad I started crying in the middle of the mall.