Thats what I was like when I had a supercell thunderstorm roar over the top of me

Really scary, I was luckier than those in Whyalla though, I was further South. If I had stayed where I was, near Pt Pirie, I would have felt it a little more...
It's quite an experience getting your car slammed by 100+km/h winds, torrential rain and hail stones that could kill you if you got out of the car. Not a place anyone should be deliberately.
The funnel cloud occurred after all the storms had passed funnily enough, it formed on the back end of them all. Strange setup.