Three little things caught my attention in the beginning:
First I was surprised that pony hooves can sense the coolness of spit evaporating on a hoof.
Second I was wondering how AJ could kick an apple so hard that it smashes through a wooden target without smashing the apple with her hoof.
Third I grieved over the missed very first latin lesson for young watchers when AJ used "pegasus" as a plural instead of "pegasi".
The general message of the episode I can relate to a lot. Like Pinkie Pie and Fluttershy, I don't thrive on pressure, but excellence comes out when enjoying something.
In our world that needs a lot of cultivation, because so often results are believed to come from pressure, force. It's no surprise considering what kind of people have great influence over society and the means for success. It seems easier to be troubled than to be healthy.
Snails gave a good contrast metaphor for how not overthinking stuff can remove obstacles. This was even hinted at with his floating-buckets meditation-like pose in one scene.