I was trying to book online movie tickets in PVR cinemas. It is one heck of a pathetic web application that could have ever been built. Firstly, the availability is never updated properly. While trying to book the ticket, the app showed that the seats are available and even gave me the seat numbers. After entering the credit card details and going through the payment screen, it died down. The app never refreshed to show the status of the payment. On refreshing the page, it showed the same seat allocation and the payment screen. Going through it second time also ended in vain. After restarting in fresh browser window, I found that the seats are full instantaneously. There has been no error or update stating that the credit card hasn't been charged.
This made me feel that online train ticket booking is much better app. IRCTC should get a pat on their back!