Houdini has some nice skill shots. Pull the plunger just right to hit one of the 3 alternating middle "E" "S" "C" lit targets to collect the reward for that particular one (no lane change options here). This really requires the perfect combination of timing and plunger strength.
If you're really good, however, skip shooting at the middle targets and lightly arc the ball across the lower playfield to hit the lower left target for an extra bonus. This shot is all about plunger strength (and luck) to not accidentally hit a random switch before it gets there. I can only pull this trick off once in a while.