"The innate hostility of inanimate objects"
That's a phrase coined by my dad (certainly used by him) for those moments when things start to get their own back... Frequent moments, in his case: how often the air rang at home with "Come on, you damn thing" or "Why the hangment won't this wretched object.... &c &c" (Incidentally, anyone else ever heard the word "hangment" used to replace a profanity?)
With me, it's coat hangers. I just found myself swearing at a series of wire triangles which would not separate, and those that did insisted on slithering to the floor, behind shelves... I banged my head, grazed my knuckles...

Anyone else got any inanimate objects that regularly wish them harm?
"The isle is full of noises... Sounds, and sweet airs, that give delight and hurt not"
The Tempest, Act III scene 2 ll 148-9