When tellers start asking me questions "conversationally" I wonder if they're being polite, or actually sussing me out. Apart from the idiot teller mentioned in the OP they've probably had some form of fraud training, like reading body language signals. I once asked for a bank cheque for nearly $10k and the teller seemed reluctant to give it to me, even the way she said goodbye was like "the shit is going to hit the fan when they find out this is fraudulent"... I hate banks. Just give me my fucking money.
