yea intel chips never had one come off with cooler. The new AMD chips, first time I was redoing thermal paste thought I was being careful, whole CPU came out. NO issues, but man it was like cemeted on their.....super odd........and the PC had ran for a long time, but I guess you want to run stress test for an hour before to see if that helps. Thermal paste was like cemet on that thing............very interesting experience for sure. I had heard this was possible and was being careful and still happened.
seems on the intel boards you have have to be careful not to bend the MB pins, since the CPU dont' have them.........
just always best to get a friend who has a lot of experience if your not comfortable.