Pop a value or a string and jump to that frame. Numerical frame numbers start at 0 and go up to the number of frames - 1. When a string is specified, it can include a path to a sprite as in:
/Test:55
When f_play is ON (1), it wakes up that sprite (movie, thread). Otherwise, the frame is shown in stop mode (it does not go past the Show Frame tag.) This action can be used to playback a sprite from another given a set of events.