In the EARLY days of Arati, they were getting about a 90% failure rate out in the field with the game cartridges. The testing in-house could not figure out what was going on. One of the engineers took the latest super tested 10 times cartridges home for his kids to play with while he watched. They had two different systems set up in the same room. After playing for a bit, they said-"Hey, let's trade" and they shot the metal sleeve cartridges across the rug at high speed to each other. BINGO- both shorted out when picked up again. Atari had to redesign the IC chips to stand up to way more than military specs to survive 10 year olds.