Sighting at E5?

The EMS group had a scare on Friday night. The 4 of us saw different things when we went up to the 5th floor of E5. Apparently, the lift does not go up there, so u have to take the stairs. Upon reaching the top (it's the last floor), u will reach a small space under the roof.. basically it's just a small portion of a corridor leading to a door. One saw a figure in white, another saw a lady with face covered in white shawl without seeing the legs. As for the later two who went up after the class to verify the 'sighting', one(me) only saw a white lab coat material folded nicely on top of a box, and one just saw a mat. So is it considered an encounter with the third kind? Maybe the rest can go and visit it in the day to verify it...