>>8224502It's also interesting to note that horizontal clips all break in the same way and at the same point.
Clis also don't seem to crack in one go but slowly tear themselves apart.
Check out your clips and see if you can find one that moves ever so slightly easier than the others then hold it so that it'll reflect light - chances are high that you see some slightly different reflection around the area where those pieces in the pic cracked or even already a tiny crack.
