Applies lethal damage (FLT_MAX) to the SKEL_Head
bone of the specified ped using the weapon passed, leading to the
ped's untimely demise.
The naming of the native is a legacy leftover (formerly EXPLODE_CHAR_HEAD in GTA3) as in the early 3D GTA games, lethal
damage to a ped head would 'explode' it.
Do note that this native function does not work in multiplayer/network environment.