Once I got an unexpected praise from a customer for some proxy work I did. I was overjoyed and exclaimed something to the lines of "see, that's how is done." A

Once I got an unexpected praise from a customer for some proxy work I did. I was overjoyed and exclaimed something to the lines of "see, that's how is done." A few days later I didn't get the recommendation letter I was supposed to receive by the same customer. There might be other things at play here or maybe he overshot with the praise. I don't know, but ever since, I don't make much of such praise. I just say thank you and move on.