Except for this one time, you need to be on co-op. have someone in the banshee and one person get in the pelican, now drive the banshee to where the pelican crashes and wait until the next person gets there, then wait for the pelican to stop moving rapidly and push the person w/o banshee in space under pelican and hold it them there and have the person flip the pelican. IF done correctly you will be inside of it but the problem is the cockpit is facing strait up and it is (in my words) impossible to get to. I tried pushing and flipping but you just die. anyone is welcome to try it out and see if you can have any positive outcomes
back to the scorpion tank, again you need to be on co-op and have banshee. Since the halo 2 physics are more realistic you can push the hovering pelican anywherte you want it to go!(wohoo...
) now have the person w/o banshee kill himself and have him below pelican w/ tank. now have banshee person push the pelican(slow process) over to where the water pool is. have it so the lip of the cargo area is on the pelican be just over the edge. have the banshee push the pelican down on to player 2 so he gets squished by it, he should get stuck 3/4 of the way in the pelican. now have banshee person push the pelican up by digging under the nose of it and flying up w/o hitting player 2. if done correctly you should have player2 stuck halfway in the pelican. problem is if you jump you fall out and if you push them up with with the banshee they fly through the ceiling and come back to earth woth a splat! 
so if anyone is willing to try these out and see what you can make with them, be my guest 
