My first time to a LBS I (akwardly) used cycling specific lingo to avoid seeming like an idiot. After talking to a worker for a while and catching on that he was a legitimately nice guy I had to confess I had no idea what I needed for my on-bike repair kit and ask for help.

I was originally a "seat post bottomed out" rider and had no knowledge of bike fitting. All it took was one person suggesting I bring it up to realize how much easier it was to transfer power.