Collins is a very different sort of operator, she's rolled with the punches, has been down and out, but had come back stronger.
The softest part of Collins is her teeth and it's time for her to start gnashing them.
Something serious has gone down with another first-term millennial MP, Andrew Falloon from Rangitata.
Like Walker he's now not standing at the next election, throwing the party into the turmoil of finding another candidate in short order.
Why, is the burning question that the public who paid his wages has a right to know.
The first anyone knew of his demise was a statement from his office mid-afternoon, telling us he'd made a number of mistakes and he apologised to those who had been affected.
Five minutes later, Collins fired a grenade into the mix, putting out a statement telling us he's suffering from significant mental health issues.