Some jokes... Well... Almost jokes
So one day the sysadmin drove to lunch with a few Users that hadn't broken anything lately, a mechanical engineer, an electrical engineer, and a chemical engineer. On their way back to the office, the car stalled and wouldn't start. The mechanical engineer suggests an engine problem and that he might be able to fix it. The electrical engineer says its probably a wiring problem he can fix. The petroleum engineer thinks there might be water in the fuel, and that he should check the filter. The sysadmin speaks up authoritatively, sure of the solution, and says "everyone get out of the car and get back in".
Q: How many sysadmins does it take to change a lightbulb?
A: None. It's a hardware problem
Q. Where does a sysadmin go after work?