Throw Mechanic needs fromOrigin

Even when fromorigin and origin are both defined, the throw mechanic will always try to throw targets away from the caster.

This can be demonstrated with this skill, which should throw enemies away from the projectile hit location rather than the caster.

mob-timebomb-cast:
  Skills:
  - skill{s=mob-timebomb-fire;damage=6;range=64;radius=4;duration=2;
    origin=@SelfEyeLocation;branch=true} @forward{f=12;uel=true}

mob-timebomb-large-cast:
  Skills:
  - skill{s=mob-timebomb-fire;damage=6;range=64;radius=12;duration=6;
    origin=@SelfEyeLocation;branch=true} @forward{f=12;uel=true}

mob-timebomb-fire:
  Skills:
  - sound{s=item.trident.return;pitch=2;volume=0.9} @self
  - projectile{fo=true;tickInterpolation=1;syo=0;sfo=0;
    onTick=mob-timebomb-tick;
    onEnd=mob-timebomb-hit;
    b=ITEM;material=TNT;enchanted=true;
    ham=true;v=30;MaxRange=<skill.range|32>;i=1;g=0.2;hR=0.25;vR=0.25;hnp=true}
  
mob-timebomb-tick:
  Skills:
  - e:p{p=dust_color_transition;color1=#EE4B2B;color2=#DC143C;amount=1;size=0.8;speed=0;hS=0;vS=0} @ProjectileForward{f=0}
  
mob-timebomb-hit:
  Skills:
  - setvarloc{var=skill.originloc;v=@targetedlocation{yo=0.1}}
  - raytraceto{fo=true;origin=@VariableLocation{var=skill.originloc};md=<skill.range|64>;rw=1;
    locationskill=mob-timebomb-signal} @VariableLocation{var=skill.originloc;yo=-2}

mob-timebomb-signal:
  Skills:
  - setvariable{var=skill.currentradius;value=0;type=FLOAT}
  - setvariable{var=skill.duration;value="<skill.duration>*20+2";type=FLOAT} 

  - aura{d="<skill.var.duration>";i=1;fo=true;origin=@targetedlocation;
    ot=[
    - setvariable{var=skill.currentradius;value="<skill.radius|3>/<skill.var.duration>*(<skill.var.duration>-<skill.var.aura-duration>)";TYPE=FLOAT}
    - message{m="<skill.var.aura-duration> <skill.var.currentradius>"} @self
    - e:p{p=dust_color_transition;color1=#EE4B2B;color2=#DC143C;a=1;y=0.2} @RAO{p=12;radius=<skill.radius|5>;roty="<skill.var.aura-duration>"}
    - e:p{p=dust_color_transition;color1=#EE4B2B;color2=#DC143C;a=1;y=0.2} @RAO{p=12;radius=<skill.var.currentradius>;roty="<skill.var.aura-duration>"} 
    ];
    oe=mob-timebomb-explode} 
  - e:p{p=dust_color_transition;color1=#EE4B2B;color2=#DC143C;amount=4;speed=0.4;hS=0.25;vS=0.25} @targetedlocation

mob-timebomb-explode:
  Skills:
  - effect:particlesphere{p=dust_color_transition;color1=#EE4B2B;color2=#DC143C;a="18*<skill.radius|5>";r=<skill.radius|5>}
  - skill{s=mob-timebomb-hit-entity} @ENO{r=<skill.radius|5>}

mob-timebomb-hit-entity:
  Skills:
  - throw{fo=true;origin=@origin;velocity=10;velocityY=7}
  - damage{a=<skill.damage|6>;pi=true} 
  - skill{s=mob-timebomb-explode-sfx} @self
  - skill{s=mob-timebomb-explode-sfx} @origin

mob-timebomb-explode-sfx:
  Skills:
  - sound{s=entity.generic.explode;pitch=0.8;volume=2}
  - sound{s=entity.player.attack.crit;pitch=4} 

The relevant portion of this skill is mob-timebomb-hit-entity Cast behind an entity while standing in front, target will be thrown away from the caster instead of the projectile hit location.