Quoted from Rarehero:... On Rush, the upper flipper goes to the ramp - which can divert & give you more combo possibilities - or the upper loop which comes back to the upper flipper...
It can also go to the dead-end/VUK lane or the time machine. Not that there is a clear line for either from the upper flipper, but I have managed to hit both at different times when I've bricked a shot I was trying to make to the inner loop.