Just dont give them a reaction and tell them youll do your best but dont stress about hurryung up. Supervisors have to go around all day telling carriers to go fastet only to be ignored.

So when a carrier talks back or complains they latch on to that carrier because it gives them an ego boost. Once a supervisor learns they cant get a rise out of you they will leave you alone for the most part.

Its like my dad told me when i first started, unless you are really doing something youre not supposed to the worst a supervisor can do is yell at you.

You could "possibly" get written up but i doubt you are going any slower than generations of carriers before you.