Hmm.. Seems like there are many ways to conceptualize what you are talking about.
Do you mean as if it were like a knitted sweater and you were pulling one end of the string, unravelling the sweater in a zig zag like pattern?
And if so, would you expect the actual footage to follow through with the unravelled string, as if the footage was actually composed of the strands of string? Or simply as a matte to "wipe" on or off the footage?
Those questions sounds very confusing but hopefully they make enough sense to get a better understanding of what you're looking for.