Sndt college stairs ghosht

Hi readers,I want to share my real life experience,it was year 2012, I was doin interior designing from college SNDT,churchgate, our class used to starts by 1 30, it was situated in parallel building just opposite the main entrance gate,1st floor,right side last Corner room,I reached early that day,it must be around 1pm,as there the stairs are really old and made of wood,1 can easily listen the foot steps of anyone climbing it,I was arranging my wooden board, used for placing cardboard sheets for designing students,whole class was empty,suddenly I felt cold waves around,it was a chill giving experience as mumbai dnt have cold weather that too during afternoon time in scorching heat and with the sudden happening