RCL IND IND: a solution in search of a problem?

[Ángel Martin]

While doing some code optimization in a few FOCAL programs I briefly considered a RCL IND IND implementation to approach a segment of code dealing with pseudo-recursive register manipulation. I ended up tossing the idea to the bin but wonder if anyone here has had similar thoughts..

Is the RCL IND IND an absurd concept, or would it be actually useful for anything? I must admit I can't come up with an example right now... also wonder if some similar structure is available in RPL models (so advanced they were, right?).

What say you?

for clarity, here's an example:
Say register 5 contains the value "6", and register "6" has the value "3",
then RCL IND IND 05 = RCL IND 06 = RCL 03