A car. A driveway. A toddler. Then, in one sickening instant, a catastrophe. You can't imagine anything more agonising than watching a child – your own child - fighting for life and being in that position because of something you had done. But it can happen to anyone.
Sam Cannon was in the wrong place at the wrong time and was run over in his driveway by his dad, former Australian rugby representative Brendan Cannon.
Sam suffered terrible injuries in that accident and came close to dying. Luckily, the little boy is every bit as tough as his famous dad.
Watch the video.