What caused the accident to occure in the 1st place?
Well, Dusk and he's brother (that we will call Dawn from now on thanks to a suggestion) worked in their lab, trying to restore the machine Dr. Gaster invented a long time ago (the very same one that he fell in and was shattered through time and space) to hopefully try and bring him back. Sadly it didn't go as planned when the machine started to malfunction even more, leading to an explosion causing both the scars, and damages to Dawn's memories.
I hope it's interesting for y'all!











