How to do it: Sometimes for some unknown reason, your carepackage/deadbody falls under the map.
If you have this, you can do this RC-XD UFO-mode thingy.
Dont go straight in the wall but a little to the left or right else it wont work.
My friend told me you have to stand on a car to get this working the best.
(the rc-xd needs to spawn next to the car while your standing on the car or else your rc-xd will fall under the map.