When training in Magikarp Jump, you can have either a "Good" (1x), "Great" (2x), or "Excellent" (3x?) result. I've noticed that I seem to have more "Great" or "Excellent" results on certain trainings - the tree knockdown one in particular - and nearly none on some, like the sandbag which I've never had a non-good result (out of, maybe, 20 tries); on the other hand, my son has had plenty of sandbag bust-ups.
Is this random chance, or is the 'tapping' or something else I'm doing having an effect on the result?