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Google is showing dynamic filters for some queries in the local pack. So if you search for something very specific, and Google can filter based on the query parameters, Google might show that filter in the local pack filters. For example, Sergey Alakov posted on Twitter that he searched for [best bar within 233m open now] and in his filters, he saw the "within 233m" filter button.
Here is his screen shot:
I get something similar on mobile when I try that search from my location, but it say "No results for these filters. Clear your filters or select new ones and try again." This is how it looks on desktop:
Google recently started showing dynamic business categories based on query as well.
Forum discussion at Twitter.
