UnknownPlayer.com has posted an interview with Randall Glass, the author of the extremely popular Warthog Jump movie created with Apple's iMovie software and Bungie's Halo:

How long did it take you to create this movie?

{rglass} I have about 1.5 hours of videotape footage of the jeep doing various things. It took about 30 minutes to set up the stunt itself. I'll talk more about that in a second. Editing the movie took considerably longer. I figure it took about a day and a half (not continuous). The first cut of the vid was well over 5 minutes. I went back and forth about what songs I wanted to put in it, what sound samples worked best. Setting up the trick... I knew I wanted to launch the jeep over some sort of arch (it's pretty boring just launching it straight up. I had to make a game of it). The funny thing about that particular halo level is that when you force a marine out of the jeep, in most cases he'll run immediately back to the beginning of the level. It's hard to clobber the guy when he's running away from you. Fortunately the marines didn't run near the place where I shot the vid. So I knew that was the right spot. The perfect thing about that spot is that you can see the jeep after it's cleared the arch, so you know if it made it over. I think bungie may have secretly made that arch just for warthog jumping.. ;-)

Thanks to VoodooExtreme for noting the interview.