You can work ten straight days and legally not receive overtime!!
The store I worked in was poorly run, with the store manager giving us unloaders our assignments for the evening shift (4:00 p.m. to 1:00 a.m. in those days) before he went home at 5:00 p.m. The assistant store manager would then come in and give us conflicting tasks based on what he wanted, making it impossible for us to meet the store manager's original orders on time, which we were still expected to carry out.
Consequently, we were told to clock out at quitting time but then "asked" to come back and finish the job on our own time (or else). Nobody complained since they needed their jobs and did not want to rock the boat. After a couple of weeks of this, I finally found employment elsewhere and quit.
Needless to say, I don't think too highly of Walmart after seeing how it works from the inside as an unloader/stockman "associate."