Okay so like.. anyone else had the (dis)pleasure of working in a building with one of these fucking things? XD
For those that don't know, it's a Hirsch ScramblePad reader!
When you scan your access card, the pad lights up and rapidly randomizes all the numbers on the keypad several times before giving you a final layout to use to enter your PIN.
They also had an extremely small viewing window that meant anyone not immediately in front of the keypad (or standing to the side) /shouldn't/ be able to see the numbers on the pad, thus shouldn't be able to figure out your PIN.
Hoooowever, at least for myself, I couldn't ever successfully enter my PIN on the first go from fumbling reading the numbers properly XD