My favourite bug came from a university assignment on autonomous robotics. We had to build a small robot using various sensors, such as some whiskers which could be used to detect some metallic tape stuck to the floor of the arena.
One of the other teams found that their robot kept freezing after a few minutes of moving around the arena, I assumed this was due to exhausting available file handles or some other bug in their code. But after some time they realised that the bug only happened when the metal castor they had used on back of their robot touched the metallic tape.
Sure enough, when they replaced the castor with a bit of lego their robot continued to run perfectly for the duration.
The lego construction of the robot must have been building up some static charge which was then discharged when running over the metallic tape and taking out the ARM computer when it did so.
I'd have never believed that one unless I'd seen it with my own eyes.
One of the other teams found that their robot kept freezing after a few minutes of moving around the arena, I assumed this was due to exhausting available file handles or some other bug in their code. But after some time they realised that the bug only happened when the metal castor they had used on back of their robot touched the metallic tape.
Sure enough, when they replaced the castor with a bit of lego their robot continued to run perfectly for the duration.
The lego construction of the robot must have been building up some static charge which was then discharged when running over the metallic tape and taking out the ARM computer when it did so.
I'd have never believed that one unless I'd seen it with my own eyes.