A woman dressed in a business suit trips and falls face-first into a mud/clay pit in a Czech CS-BETON commercial from 2016. The scene itself is quite short.
In the video, there are also some flashes of her feet and pantyhose if you are into it.

Link: https://www.youtube.com/watch?v=_lzd0d6xpP4&ab_channel=CS-BETONs.r.o

Nice vid! Thank you for posting !

Any tips for finding foreign scenes or clips like this? I feel like there are a ton out there but just typing things into Google translate doesn't always yield results given the nuances of each language.

You may try to search various phrases (e.g. in Czech: "dortova bitva" = pie/cake fight, "dort v obliceji" = pie/cake in the face, "zapas(y) v bahne/blate" or "bahenni zapas(y)" = mud fight(s) ). However, a lot of messy scenes are textually undescribed so they cannot be searched via phrases but have to be encountered directly. This particular commercial, for example, I wasn't searching for anything like it. I was just lucky to notice it back in 2016, but had forgotten it until recently. It was made by a construction company, and nowhere in the subtitles, the video description nor anywhere else is ever mentioned mud, mess, humiliation etc. No one would be able to find it by searching it blindly. As such, there are surely other clips like this one that we don't know about.