Re: the existence of jinn
^^ You said they changed shapes?
This is straight copied from Cressi's post that Gizzy gave the link to:
Lastly there are the jinn who are called "ghouls" or "gheelan" (plural of ghouls). and these types of jinn appear before humans and rapidly change their shape. The Prophet (saw) said, "If the gheelan appear before you and transform themselves before you, call the adhan." (Ahmad)
TNW - I would've honestly pissed straight in my pants if I had seen something like that :(.