Met a middle age man with a green bag at the bus stop and we chitchatted.

MAM(showing me his money): I have $1. Would you spare me another $1 so I would take a bus.
me: But $1 is enough.
MAM: I need one more dollar for a return trip.
me. Sorry but I don’t have any coins.
MAM: It’s OK. You can give me a $2 note and I give you my $1 as change.
me: Stop lying!

I mean, how does he make two trip with a single $2 note. Of cause, everyone looked at him when I raised my voice. At his fastest speed, he walked away and crossed the road. With his striking green bag, everyone simply had their eyes locked onto him.