Dumb statements, inaccurate stuff, flat out lies, attempts to rip you off, poor treatment, anything.
Mine happened today. One of our Gamestops here just put out their Wii U promo materials and I decided to make some small talk about while I was pre-ordering NSMB 2. Boy was that a mistake:
Me: "So I see you have the Wii U promo stuff out already."
GS guy says to me with a straight face and a dead serious tone:
"Yeah, I'm still not convinced it's coming out this fall though. I'm thinking more like somewhere between December to March."
Me: "No, actually Nintendo has said a million times it's being released this fall."
GS guy: "I don't think so."
Me: "So you guys are putting out promo stuff for a system that may not release until March 2013?"
GS guy (nods uncomfortably): "Weirder things have happened."
Me: "OK. Do I need to sign for this pre-order slip?"
GS guy: "Nope."
Me (trying not to laugh): "See ya."