Here we see a big drops in overall organic rankings as well. At the beginning of week (Nov 3rd) we had decent gains (up to 20%), but at the end of the week (Nov 9th) we have drops around 30% compared to same period last week.
Those are part of the newest rich snippets Google put live in serps. You will have to implement proper schema in order to obtain those. More information:
Article | Search | Google Developers
Google confirms new FAQs, Q&A and How-Tos for search results snippets - Search Engine Land...