Love the way the guy is not using the slide guide in the pic...LOL
Weirdly he was actually about to flip that board vertically and cut a groove for "T-moulding" type trim using the cutting blade. I've never seen that done before and we won't be doing it either - we will have a dedicated router table to cut the T-moulding slots.
Aaah - OK.. flips onto edge and slides the work through... have done it myself on occasion and it never feels "safe"