> when he showed hesitation, they got too impatient.

This seems to be the common factor among scams, cons, and social engineering strategies. Rushing people will have them bypass protocol, training, and security practices. It's a universal "hack" for our brains; we do things we otherwise wouldn't when rushed. Security practices are like a rituals, standards of behavior that we just don't have time for right now.

"The funds are only available for the next hour"; "You will be prosecuted if you don't do X"; "Per the CFO, we need to spend these funds before end of day."