Last Friday night I was invited by a group of ghost hunters to attend a venue alledged to be haunted by more than one ghost/spirit. There were two mediums at the venue. Apart from witnessing the usual 'two knocks if you are there' phenomenon. The most impressive thing I witnessed was levitation of a table. A group of about twelve of us gathered around a table one of the mediums told us to put one finger under the table and lift it. This was to give us some idea of the effort requied to lift it. Then we were told press down with both hands on the table. After we all felt the table to 'vibrate' we were told by the medium to keep one hand on the table and to put one finger of the other hand under the table, but only to press it lightly on the table. The reason why we had to do this was to prevent the table from randomly floating around the room once the er 'spirit' or 'spirits' lifted the table. We suddenly felt the table lifting up by itself and floating around the room while we followed it, guiding it by each of our one finger. I had the impression that someone was cheating, until the table started to bounce up and down on our fingers. I could find any ropes, wires, etc. So how exactly was this trick done?