minnapple - 1:35 am on Oct 13, 2011 (gmt 0)
There was a time were you could redirect any domain without page rank, to a domain with page rank and get page rank to transfer to the redirecting domain.
Site A = pr0
Site B = pr5
Site A is 301 redirected to Site B for several months. Redirect is then removed, then . . . .
Site A = pr5
This is false toolbar page rank that carries no real value in terms of traffic.
What you described could be the reverse sort of.