Nathalie,
No, there are no bonus sections on the Plyo Leg discs. The "bonus sections" I was referring to can be found after each M1 Leg Disc (4 in total). As I recall, all of the bonus sections are floor/barre work. There is one with ankle weights (forgot the disc #) and BOY OH BOY! Let's leave it at that

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BTW, I see Cathe is including some of the same exercises from STS Legs in Xtrain! Which is great because I absolutely LOVE all the STS Legs! Plyo Legs is one of the most effective, unique LB workout I have done so far!
Good luck! You are gonna "fry" with those bonus sections