I didn't expect...

There are times I feel we delude ourselves into believing things that we know aren't true. There are some things that are so common that it's really foolish to set false expectations. Common sense may not be so common. 'Trust and verify', and 'everything changes' are phrases that get me through the day. Here are a few items I hear people say "I didn't expect..." that come to mind for me. Do you have any to add?

I didn't expect...

Some of these are fun, but others are way too serious, and too common.