this is darren's performance of RGM, from luke jermay's 7 deceptions.
the method is suggestion, but as we can see, the subtle command is extremely subtle, and he suggests that they will forget their stop in a way that is barely noticable.
i have performed this effect every once in a while, and trust me, to pull something like this off, it takes baaaaallz. i currently have a less than 40% success rate.
i also believe that footage was shot while luke was working for derren brown.