Hydrogen peroxide powered rocket packs fly for around 30 seconds, because they have a specific impulse of around 125, meaning that one pound of propellant can make 125 pound-seconds of thrust, meaning that it takes about two pounds of propellant for every second you are in the air. Mass ratios are low for anything strapped to a human, so the exponential nature of the rocket equation can be safely ignored.

A pretty hot (both literally and figuratively) bipropellant rocket could manage about twice the specific impulse, and you could carry somewhat heavier tanks, but two minutes of flight on a rocket pack is probably about the upper limit with conventional propellants.

However, an actual jet pack that used atmospheric oxygen could have an Isp ten times higher, allowing theoretical flights of fifteen minutes or so. Here, it really is a matter of technical development, since jet engines have thrust to weight ratios too low to make it practical. There is movement on this technical front, but it will still take a while.

John Carmack

I have no memory of the soundtrack music. That in and of itself might say something. I'm a musician, but it just didn't register.

Thus it had a successful soundtrack. A good movie soundtrack only compliments the movie, but is not intrusive. There's nothing worse than being highly involved in the scene and suddenly the music rings out and you think, oh, that's Will Smith's theme again!

When they cut the original Matrix movie, they made a point to edit the scenes without any temp scoring so that they would stand on their own without music, thus leaving the music to be composed as a compliment, rather than the scenes being edited to fit the music.

It took a couple of viewings of Fellowship before I started picking out the themes in the soundtrack. A friend of mine thought the score was terrible initially because he didn't remember it, but loved it after a few more listens.

Memorable themes seem to be needed in musicals, superhero movies and... Titanic, I guess. :)