i hav found a way to ride in a seat of a pelican. go to the level of metropolis and then go about half way to where u see the two pelicans come to u in the area where the scarab blows up the tank. then u wait for the dropingoff off your troops. you then under the ship where the marines come out directly under the drop off spot jump up and HOLD down X. it ashould then seat you in the pelican. then you ride for about 2 minutes anjd then u will start spinning and crash. when you fall out of it it will say press X to flip the banshee. don't do that yet walk away a bit to stay out of its way. it will either kill you or throw you in midair far. you back off a little and be sure when you flip it its not going to hit you. P.S. whan you crash its a dead end area.
if you don't know whats a pelican its the marines big dropoff ships. they drop warthogs, scropions and troops. i hope you enjoy. if it didn,t work you did it wrong. i can guarntee it works it did for. have fun. srry about the lots of words you have to read.