I don't think it was a case of "bouncing", but more one of suspension bottoming out hard enough to deploy the airbags..
There's a bump on South Western Hwy where Mudijong Rd hits it, if you're heading North and take the right hand lane past the turn off. I've hit that an 90kph in my 'line, something bottomed out, something went THUD. Nothing was broken and my non-existant airbags didn't deploy but fk, I have never taken that lane again