Advance sales of Avengers: Endgame movie tickets in Singapore caused cinema websites to crash on Wednesday.
Singaporean Marvel fans took to social media to complain after being unable to purchase cinema tickets.
Shaw Cinema introduced an online queue management system that saw over 72,000 people waiting for hours for their turn to select tickets.
Some people took advantage of the situation to resell the tickets online.
Golden Village and Cathay Cinemas both experienced problems with their online payment systems.
The cinemas told Channel News Asia that their websites were unable to handle the sheer numbers of fans trying to buy tickets online.
Cinemagoer Devaash Mahantheran said he had to wait for five hours in the Shaw Cinema online queue, before the system crashed and pushed him to the back of the queue.
Vincent Wong was similarly unhappy: “No matter which browser and which platform I use, I keep getting an error message and unable to complete my transaction. Take a look at how many seats are on hold with no way to advance to [the] payment stage, and nobody responds on the customer service line.”
People could still go to the cinemas in person to purchase tickets, and on Singaporean online marketplace mobile app Carousell, there were hundreds of listings reselling pairs of Avengers: Endgame movie tickets at various prices.
Tickets are being resold from $20 Singapore dollars (£11) all the way up to $600 Singapore dollars (£340).