I just started my first job, and two hours into my first shift I was given a lecture by the district manager (Who had popped in unexpectedly) because I was slow and really wasn't doing much.
1) My numbers hadn't come through so I couldn't use the cash register at all.
2) My boss was too busy at that time to continue telling me how to do everything, so I couldn't really do much but straighten stuff on the shelves anyway.
3) I HAD WORKED ALL OF 2 HOURS IN MY FIRST JOB.
I told him so. I don't think he liked being talked back to...