The difficulty of the trick ranges greatly, from some that take a few minutes to accomplish, to much more complex ones that can take months, even years, to master.
Van Heflin's character Sam performs this manipulation throughout the 1946 film The Strange Love of Martha Ivers.
The characters Peter, Walter, and Elizabeth Bishop perform this trick in the TV show Fringe.
Steve Carell and Alan Arkin also perform this feat in tandem (almost a "dueling knuckle walk") in the movie The Incredible Burt Wonderstone.
Actor Val Kilmer can be seen doing the feat in both Tombstone as Doc Holliday and in the movie Real Genius, performing a double-handed continuous hand roll.