This is the shot that Harry Crabtree intended to trap Weenie Beenie with. It is an uncommon shot for a very common One Pocket situation. You need to use inside english to float the cue ball three rails and up the table.
To see another more common way to play both the back ball and the front ball towards your hole, Sonny Springer described that in his interview:
Sonny Springer's way to play both balls for your pocket