Has anyone run into this issue when replacing the rear brake pads and rotors?

As my mechanic friend and I were working on my car, we tried removing the bolts that held the caliper in place, as well as the bolts that held the caliper together and every single one of them sheared.

We could not figure out how this happened and I was just curious to see if anyone else ran into this issue when working on their rear brakes?

 

it looks like you used impact gun to remove them, also if you look at how there twisted , it seems as that you removed them the wrong way, ......... instead of left to remove you went right

 

lol oh wow.