Well, that should be easy to fix. Since you have watched Jeff F's video then you already know to make it up to the second apple as soon as possible to set yourself up for the fast spark smash. What I've been doing is once Jr. lands on the second platform to head for that second apple, is to listen for "5 steps" as he goes left. That should position yourself perfectly below the apple and maybe give you and extra split-second to concentrate on the smash. Getting the smash down pat is, of course, just a matter of practice.
If you are playing for points, missing this spark wreaks havoc on a scoring average because you have to waste time trying to set up a safe opportunity to kill him with the top apple (which can be tricky), when that apple should be used for a triple blue spark smash. You can lose 10k+ on that board by missing that spark.
Steve W: If you read this, what'd you get at Funspot?