A friend of mine was a trader of some long term with a particular bank and, because of his length of service with the bank, had to receive a few month's notice of termination.
They terminated him and made him come in to work to sit in a featureless room with only a table and chair -- no computer, nothing. He'd rather stay at home and garden or whatever, even it meant finishing up early, but they wouldn't let him. He always said that he must have seriously pissed someone off in HR.
Banks do this quite often on employees, who could create huge damage for the bank. For example traders.