I work at the front counter at YearOne on occasion (normally i work in shipping so i don't have to worry about the fuck-nuts)

I get allllll the time:

Me: how's it going, sir?
CUST: good... i need... well i need, it's a little black piece under the dash
Me: ok... what kind of car are you working on?
CUST: '69 camaro
Me: ok... do you have any idea what it does?
CUST: nah, not really. it doesn't work anymore, it's like a sensor or something. I don't have my cluster in right now so I don't know what's not working
Me: oh. well i don't really know what to tell you
CUST: well you don't have a manual or anything
Me: well maybe, but you can't really tell what everything is
CUST: well what the hell did i come here for?
Me: i'm sorry, sir. if you can figure out what it is i can find it no problem
CUST: bye


WTF? lol. i don't know what every piece on every car ever made is lol.

people always wanted me to tell them what pieces were that weren't even on their car anymore.