After receiving David's suggestion in the comments under this post, I ended up speaking about those sunsets. You know, the ones you take pictures of. I think it went well - I managed to mention how sunsets are linked to death, but then end on a rather upbeat note, which was a relief, as I spoke at the end of the day and there was no-one to be upbeat after me.
Thank you Russell for organising it. And thank you to Marcus, whose video contribution to my sunsets bit has now turned into an informative series.