Backwards Long Jump (BLJ) is a game breaking glitch not used in this Super Mario 64 run so that the runners can show off a variety of other lesser known glitches. Despite BLJ being banned, Mario shows that he can still collect 70 stars with ninja-like reflexes.

BLJ can be seen in the 1 key and 120 Stars runs.

See this movie played back on a real console.

Note: There are encodes of higher resolutions in the discussion thread.