Often you will see an angled back cut. You will never see it taught or printed as an acceptable method of felling.
The practice has continued and stumps like the one in the picture below is seen too often.
This thread is to sort the shit from the clay regarding this technique.
In page 2 of this thread the discussion came up, and there were some reasons given for it. Those posters may want to add their information to this thread now.
conventional figure-8 