1. Watch the episode where Rock Lee starts fighting Kimimaro.

2. watch the seen that leads into Guy's flashback.

3. GUY: "Lee had just mastered the REVERSE LOTUS, and I took him out to Ichiraku Ramen to celebrate"(or something to that effect)

Well, last time I checked Lee didn't know the Reverse Lotus in this dub, just the Primary and Hidden Lotus. The Japanese name for the Primary Lotus is the Front Lotus, and Hidden Lotus is called Reverse Lotus or Primary Lotus. I don't know why they changed all the names of the techniques....