I worked at a retail job that had mandatory 12 hour shifts on black friday. Even for the people who didn't work in the back. They put them on the floor cleaning up. And they only gave you two 15 minute breaks and a 45 minute lunch. Most places give you that just for a regular 8 hour shift.

I honestly didn't mind working during the holidays until me and a FedEx delivery guy got into it which put me in a bad mood.