Things not to do
1:1 If there is a light on your office printer that tells you that the waste toner cartridge needs emptying, do not vigorously empty it towards you, especially if it is very full. It is like to explode with fine black dust all over you. This is apparently hilarious fun for your colleagues, but not so nice over your work clothes just before you are teaching a ton of masters students, paediatric life support!
I have done this on numerous occasions - usually, of course, whilst wearing white. I'm generally pretty good with anything mechanical thanks to all the time I spent sitting on the tool chest in my dad's workshop watching him build engines, but printers, photocopiers and fax machines just don't like me and will grasp any opportunity they have to attack me.
I am just over-confident when it comes to this stuff. I think if I fiddle hard enough, I'll fix it! No no no