Kyle Sandilands utterly petrified by on-air 'exorcism': 'This is not cool'

We've seen Kyle Sandilands pranked many times, but we've never seen him quiver with terror like this.

The KIIS FM shock jock genuinely lost his marbles over a live exorcism performed on his breakfast show with Jackie O.

Only thing is, all of the guests, including the priest, were actors – and Jackie O had organised the whole elaborate prank.

After the terrifying ritual, the supposedly "possessed" guest broke the news to Kyle that it was fake.

Kyle admitted he was "just about to have a heart attack". To be perfectly frank, we don't blame him. Watch above and see what we mean. Convincing, right?