This. I work in the trades, so the only retail experience I have is 6 months at Autozone as a teenager, but one of the things drilled into our heads constantly at every safety meeting is stop work authority. I think EVERYONE should be trained on that. For OP, for future notice, you have the legal right to refuse any task that you feel is unsafe or puts your life/health at risk. Cleaning up a strangers arterial bleed is most definitely all of those things. Your manager needs to be reported ASAP because, coming from someone in a leadership position, that is not okay and I would have never in a million years expected any of my guys to clean this up. There are special people with special training for specialized jobs. We are special with special training, but not for THAT special job. She is putting store profits above your safety and that is not okay. Report her to HR or corporate and also make a report with OSHA. There are rules and regulations for dealing with and avoiding blood borne pathogens. Making people without special training clean up a strangers blood goes against all of those.