function gethit()
{
	if(your->parent != me)
	{
		your.health = 0;
	}
}

action playeraction()
{
	my.emask = ENABLE_ENTITY;
	my.event = gethit;
        ...
        while(1)
        {
                c_move(me, NULL, vector(my.velx * time_step, my.vely * time_step, my.velz * time_step), GLIDE | IGNORE_YOU);
	        c_rotate(me, vector(my.campan - my.pan, 0, 0), GLIDE | IGNORE_YOU);
        }
}

action shotaction()
{
	my.push = 3;
        ...
        while(1)
        {
	        c_move(me, vector((90 - my.shotpower * 30) * time_step, 0, 0), NULL, IGNORE_PUSH);
        }
}