I've done quite a few out there things on previous projects. Some of the more extreme are:

- I invented a new kind of ML for quant work (day trading bot) that ended up being quite successful. It's not published anywhere for hopefully obvious reasons.

- I've written models that I've productionized to embedded. I also wrote a script that converts between languages, automating the process.

- I reverse engineered google's page rank tech (my first DS job actually) and ended up getting higher accuracy on website classification than a team of experts manually classifying web pages could do.