Sorry to ruin the joke, but they both would fall at the same speed and inflict the same amount of harm, the only difference is what would happen to the phone. Physics.
@Jayjiggz, fyi that's a Palestinian kid. Need I say more? I know his pic is used to present humor but I'm sorry cos knowing what that kid went thru, I just can't find the funny part even though it's a good joke..
this happend to my friend once.. rip friend