Tapping on Shoulder

From: Paula (countryhdchic@yahoo.com)
Story type: Ghost
Location: Work
Source: Form Submission

This happened yesterday, August 23,2005. I'm a receptionist for a large corporation and I was sitting at my desk looking at websites on 9-11. Nobody was in the same vicinity as me. All of a sudden I felt something tap my left shoulder two times. It was really weird and it took me a while to realize what had just happened. I don't know of any past history here in this building but I also don't really know anyone who has passed away recently or that was close to me. Could it be someone asking me for help?