Legends of Spark Season 1 Episode 43 Secrets of Speed

Spark hits a snag in his training, and hears Flash and Thunderbolt talking about a "secret". He stops his training and becomes obsessed with using this secret to make a breakthrough. He sneaks into the office and secretly learns Flash's secret, but as he is racing Harry, he learns that the so-called "secret" is just exercise. Crestfallen, he falls behind in the race.