Expectations...

If you don't expect the unexpected to happen - you will not enjoy it. Unexpected things are magic - but you have to expect them to happen.

If you set your mind to "expect the unexpected" life will get even more enjoyable. And if you do not adjust your expectance you will get annoyed by all the unexpected events around you.

If you unexpect a person (i.e. makes something that the person did not expect) you might get a reaction not corresponding to your intent. And the only thing worse is to unexpect the same person twice...