The real irony of this semantics discussion is that it was sparked by the following question:
can you teach me how to do a reversal
He appears to be looking for BFM/ACM tips on how to perform a 
reversal, to maneuver from a defensive to an offensive position, not how to 
reverse, or change direction.
TC addressed both things, but I think came closest in his question about the 
Barrel Roll Defense.  Likewise Puma, as usual, was on point when suggesting starting with the basics, like 
Energy state.  TC and Puma exploring those lines they started on would probably be most helpful, if continuing a discussion about 
reversals.