I posted this before in the "My wife has complained that OpenOffice will never print on Tuesdays" discussion [1], but it's worth repeating:
I heard a story about a terminal in a public terminal room that a user was able to consistently log in to if they were sitting down in a chair in front if the terminal, but never if they were standing up.
They thought it might be static electricity, or some mechanical problem, or "problem exists between keyboard and chair", but finally they noticed something else was amiss...
It turns out some joker had re-arranged the 1234567890 keys to be 0123456789, so when the user was standing up, they looked down at the keyboard and typed their password (which contained a digit, of course) by looking at the keys.
But when they were sitting down, they touch typed without looking at the keys, and got their password correct!
[1] https://news.ycombinator.com/item?id=11717010
I heard a story about a terminal in a public terminal room that a user was able to consistently log in to if they were sitting down in a chair in front if the terminal, but never if they were standing up.
They thought it might be static electricity, or some mechanical problem, or "problem exists between keyboard and chair", but finally they noticed something else was amiss...
It turns out some joker had re-arranged the 1234567890 keys to be 0123456789, so when the user was standing up, they looked down at the keyboard and typed their password (which contained a digit, of course) by looking at the keys.
But when they were sitting down, they touch typed without looking at the keys, and got their password correct!
[1] https://news.ycombinator.com/item?id=11717010