Lock/arse interface.

provenrad The ABUS around my waist took a LOT of the edge off my fall on my right hip - the plastic cover where the cable enters the locking mechanism came unclipped (snapped back in place and solid as ever), and the armoured cable got scratched almost down to the metal!

That's why those Abus armoured cable locks aren't so good in my opinion. I've seen a few cut open where the thieves have managed
to pull the armoured covering open a little (like when you fell) and get mr snippy on that weedy cable inside.