Has a colleague ever stopped you from making a big mistake at work?
This has happened to me a couple of years ago. I was once about to send back a very angry response to my boss CCing his manager once. This was because I thought he was making up stupid project and reasons to make me work on a weekend.
But when I discussed with a colleague that person told me that the boss is trying to build a case to stop me being put in the layoff list. So he is showing me as a vaulable resource whose work is critical to the organization. So much so that it needs some working weekends too. If I had sent the email I would have been on the list.