"Today I have learnt that responding succinctly and in perfect jest to somebody heckling you about your age as you speak about the impact of climate change on your generation with the literal title of their generation makes some people very mad," she wrote. "So I guess millennials ruined humour. That, or we just need to pull ourselves up by our bootstraps and abstain from avocados."
"That’s the joke," she added.
So Swarbrick seems to be saying in her defence that she was being heckled for her age by the other MP. Alas, his [I presume] voice is inaudible in the video recording. Is it known however from any other source what he said to Swarbrick right before she retorted?