Ok so I do have reversed set to true but the bombing run still doesn't initiate.

<ThingDef ParentName="BomberSkyfallerBase">
<defName>RCThrasher_BomberRun</defName>
<label>Thrasher Bombing</label>
<thingClass>SRTS.SRTSBombing</thingClass>
<graphicData>
<texPath>Thrasher</texPath>
<graphicClass>Graphic_Multi</graphicClass>
<shaderType>CutoutFlying</shaderType>
<color>(138,28,28)</color>
<colorTwo>(184,184,184)</colorTwo>
<drawSize>7.5</drawSize>
</graphicData>
<skyfaller>
<reversed>true</reversed>
<speed>0.85</speed>
<movementType>ConstantSpeed</movementType>
<shadow>Things/Skyfaller/SkyfallerShadowDropPod</shadow>
<shadowSize>(7.5,7.5)</shadowSize>
<anticipationSound>DropPod_Fall</anticipationSound>
<anticipationSoundTicks>100</anticipationSoundTicks>
<motesPerCell>0</motesPerCell>
</skyfaller>
</ThingDef>