Brian O'Halloran in Clerks (1994)
Customers not deciding what to buy BEFORE they get to the concession counter.
This is another long line peeve. Most theaters have a bill of fare prominently displayed usually above the concession stand so that people can decide before they get to the counter what they want. But unfortunately, there has been a lot of times where, instead of deciding what they want while they were standing inline, they wait until they get to the counter to debate what they want. This rather discourteous and inconsiderate behavior holds up the line of the people behind them of which, for some, the starting time of their show is getting near.