Jim, a reader, recounts a time in the early 1990s when he worked for an online bookstore. While testing the new platform, Jim forgot to disable a site crawler’s ability to add items to the shopping cart, resulting in a cart worth over $50,000. This caused a major disruption for the bookstore, but Jim was able to fix the issue and keep his job.

Wear headphones, listen for beeps, and click FIRE when the sound is centred.