I used to house sit for a guy who had an intensely evil cat. She would just fricking turn on you with no warning. Once, I was eating an Oreo and she started doing this cute, "boy, I sure am fluffy. I'll bet that cookie smells good. you should let me smell it. that would make me ever so happy." and when I leaned in to let her have a sniff, she hauled off and punched me in the eyebrow with her freaking claw.
That little jerk was constantly leaving shed bits of claw in my skin.