Since DT joined Roadrunner, they've produced four music videos, two songs from each of their last two albums.
But what if DT had the chance to make music videos from two songs from Octavarium, which would they have been?
Personally, I feel that "Panic Attack" and "I Walk Beside You" would've been great choices - the former because it was one song that had garnered a lot of attention to the band, via Rock Band/Guitar Hero fantatics, and is unequivocally Dream Theater's sound at the time - heavy and proggy; the latter because it shows DT's pop-tendencies and is a great single-sounding song, and I can imagine the video for it being very good too.
-Marc.