DAE fart so hard that their back cracks?

Like the tittle says, I frequently fart to the point where I can feel my back crack. I told my girlfriend and she said she’s never heard of anyone else being able to do that but I have and then she proceeded to ask me if the other person was skinny and I said yes so now she’s saying this this is only a skinny person thing😭. DAE fart so hard that their back cracks?