The ghost was this middle aged Chinese lady, wearing traditional apparel. I saw her in really clear detail, momentarily, then with the blink of an eye, she was gone.
We nicknamed her Ethel, and we always felt her around. Whenever the office was in a mess we'd blame her.
Sometime later, I bumped into SR who used to be a tenant in the same building. I told him about my episode,and he too had seen here and described her in exact detail - hairstyle, clothes and all.
skeptika's note:
This story comes from Hardship Postings, about people's experiences in Asia.