Place this warning at the decision point in a paranormal edit, right before the group reacts. Lead in with sudden suspense to build the moment, follow with no no wait wait for a panicked backup, then return to the main scene.
Über diesen Sound
A short voice clip, about five seconds long, of Caspersight delivering the line 'Don't do bloody ouija boards' in a blunt British tone. It feels stern, funny and a little exasperated, like a final warning after a bad idea. The clip comes from Caspersight, the paranormal commentator named in the upload.