Was flying a T-38 Form sortie with my room-mate who was an excellent stick, but not in formation. I'm solo, he's with an IP. We start doing a set of close trail, and I'm hanging in nicely a few feet behind him. All of a sudden I notice the world spinning around me at strange perspectives along with the onset of some G-force, which was never part of any close trail I'd ever flown. I realized that my Bud never sent me back to extended trail and I was tucked in behind his jet the whole time during some aggressive, over the top manuevers. About the time I'm starting to realize this is going to be a monumental BUST, He whips into a right turn and calls out "Taco 54, rejoin right turning" I counted 10 Mississippi then gently turned towards his right wing and moved up about 20 feet into position (I should have been a thousand feet away) as I moved into position I noticed the IP wasn't even looking for me, as they usually did because rejoins could get hairy sometimes. I remember him spitting some tobacco juice into his druel cup and as I slinked into position he did a double-take! and then gave me a thumbs up. On the way back all I was thinking about was how bad this was going to be, and whether I would bust, my room-mate or both. Plus I'm pissed because I knew my room-mate screwed up but I wasn't going to drop dime on him so I'd end up busting for his Fu$# up. After we landed I grabbed him to the side and asked him, "Did you ever send me to Extended Trail?" He looked puzzled and said, "I don't know, did I?" "No!!!" I told him I was 5 feet away from his tail the whole time. We agreed the best thing to do was fess-up and take the punishment. During the debrief the IP was getting closer to the portion about our extended trail and I was dreading the moment, Then it arrived and he said, "How did extended trail go for you today?" I was about to explain when he interrupted and said, "You must have had a fast jet today because I never saw you at all!, You must have been in our 6-o'clock cone the whole time!" I couldn't believe it!! I quickly stammered, "Yah, I hung out behind you most of the time because I had too much smash!!!" then the best part, he gave me an excellent because he said, "Well, you must have been in position because when we called for the rejoin you were like, right there! I couldn't see you and the next second your parked on the wing! Good Job!!" Talk about LUCKY!!!
The night of our graduation dinner we took him aside and told him what really happened!