in the post office
some trout walks in and is all like
"MY FRIEND JUST BOUGHT THIS CAN OF COKE FROM YOU AND IT'S A MULTIPACK CAN!"
totally mortified, she was
The poor bloke behind the counter who looks like he's had an hour's sleep offers her an exchange and points out some totally un-multipack cans.
She walks out with one blaring behind her "WHAT ARE YOU DOING SELLING MULTIPACK CANNNNS?!"