Dude, did you really turn to a co-worker and say, "you take this order, I don't have the patience to wait for this" while my 9-year-old was trying to tell you what he wanted on his sandwich? There were no other customers in the store at the time other than me and my children, so I'm not sure if you just woke up on the wrong side of the bed, or if you somehow mistakenly think that your job doesn't involve serving people no matter how long it takes to place the order.
Major customer service fail.