When I was young, I worked in a door shop. We put together pre-hung door units. There was a boss that got off on firing people. One thing he would do is collect applications where ever we went to lunch. When he fired someone, he handed them the applications already filled out, they just needed to sign them. It was a bunch of applications to Taco Bell and Wendy's and places like that. It was a cheap insult that also told them he was helping them out.
The worst firing I heard about was a Project Manager/Estimator/Superintendent. He took care of about half of the operations of this company. He was with it for 16 years, and side by side with the owner for 10 years before that. One day, the owner said, "I need you to go look at a job with me". They ended up taking the owners truck, and he left his with the mechanic along with its keys. They drive across town and stop at a gas station to get a coke. When they get out, the owner tells him that he's done working for him and he can find his way home and just left him there.