I can you about one really annoying coworker: Me.

The first thing I did as a sysadmim was to break my colleague's rc helicopter. After that I decided to learn Python, pestering him with questions once every two minutes. I developed, using the word loosely, some scripts that I wrote directly on the production servers, with predictable results.

After a while, I broke less things than I fixed. I learned a lot those years. Today I'm still amazed by the patience and knowledge of this guy; I owe most of my career to him.

These days I have a brilliant job stopping morons such as myself from breaking to many things. I try to be as patient and I hope to be as knowledgeable.