That, and...
A: If you want it to appear in the sky and drop, then firing it from the ground doesn't really work as you'll see it going up too.
B: If it's fired perpendicular to the character's aim, what happens if they look down at fire? It'll be an autoturret gun.

I'm going to be trying to get the matrix thing to work today, now I've got the spawning Delta Squad thing to work.