alot of classic card effects use that, infact richard sanders and jay sankey are big fan of double backers, they got so many of them in their routines.
In that thread that JTM posted, I replied with Daniel Garcia's Satisfaction Guaranteed. It is a very strong routine, with a killer ending and some very easy moves. As long as you can convince your audience that what they are seeing is a misprinted deck, the later parts of the routine will kill