SUBREDDIT: r/offmychest
TITLE: To the customer who walked in only to ask for directions
POST: Oh you don't know your way around town? How about use GPS on your fucking smartphone? Even better, get your directions before driving. You interrupt a busy service from afar, speaking over the ambient noise of the store and make misleading hand gestures pointing to our menu, causing me to construe your inquiry as one about mixing a drink "three ways". I tell you that it's possible, and ask which three. You fucking ignore me, turn away from me with a face that screams "Forget it, this fucking idiot can't answer my question", and walk out of the store.

MAYBE I could have answered your question if you forgave my mistaken listening, came closer and asked me again that you wanted to know about freeways. Asshole.
TL;DR: 
Service was busy, the context made me misinterpret customer's question about freeways as "three ways", to which I assumed he was asking if he could mix three flavors. He rudely blows me off.