@Ray
No, not really, again, look at religion - many people claim to see the same thing, altough it's very clear there was nothing.
In this case, you have told your friends what is going on before inviting them to see it, I presume. And they believed you and later on, saw exactly what you described. Or maybe they just said so.
I believe that if you want to go on and prove something, you have to start by eliminating rational explanations. For one, you'd have to get someone who knows nothing about the matter and without warning them they should look out for something make them witness the "ghost" the same way you did. They will not see anything, and if something, it would be very different from what you saw.
This works the same way as crowd panic and similar events. Once you tell people what should they look for, believers will see it all around. Weird example - If you say that the suspicious man with a brown coat and red bag is a suicide terrorist, you will suddenly find out that people see tenths of men with bombs everywhere.
Or the most fitting example, in art gallery, abstract paintings - Someone in the room says " That kind of looks like a house. " and suddenly, most of people who heard him will see a house in the painting, even tho before they saw nothing even remotely fitting a house.
As for moving objects, I would really make double-sure you are not a sleepwalker.