shopping in the self serve

you know the line
the one that invites you to scan your goods
and pay

the one with the  green and red light
on a white stick
which pokes up above the scanner

green for go
red for attendant needed

put the groceries through
then
the wine

red light ON
attendant turns up
selects icon on screen

up flashes
selections on alcohol purchase

1  clearly under 25 years age
and he pushes
2 CLEARLY OVER 25 YEARS AGE