I didn't realize what happened until my girlfriend went over the papers (she was worried about the IP papers I might have signed, given my startup ambitions) but when we saw the figures ..
It was $55k in excess of what I thought I was worth. Pants. Shat.
That gave me some serious professional backbone; once you start to make serious money, you tend to respect your career a whole lot more. I was so proud of myself I took up management responsibilities, studied software engineering really well, took on more tasks. Sure, it made me a workaholic, but it drove the point home that what I do is serious business.