Haha, yep. He flubs some parts of the other songs, too, and later mentions how he hasn't played them in a while so it is hard to remember how they go. That's crazy for two reasons, really, the first one of them being that the album was written and recorded in only a week (as JP mentions in the video), leaving him very little opportunity to get them down. The second reason is that the songs were still new when this was recorded. Just looking at a few dates, Dream Theater released Once in a LIVEtime June 25th of that year, which had a massive setlist, and DT was still actively on tour a few months later on August 30th when Petrucci did that clinic at MI (notice how, at the end, he says he has to leave for soundcheck). So I'm not sure how many shows LTE played that year (if any at all), but Petrucci would have been in "Dream Theater mode" for months by that point. They'd only released LTE 1 March 10th of that year, so, adding this all together, those songs at this point were basically a bunch of off-the-cuff ideas JP wrote and recorded in a week, a couple of months ago before this big Dream Theater tour. Meanwhile, he's probably thinking about Metropolis Pt. 2, which the band would start recording next year in 1999. They'd already recorded a 21-minute demo with the intention of releasing it on Falling Into Infinity, but it never made the cut. All in all, it's a pretty quintessential point in Petrucci's career, if you think about it.