Reading body language like a pro?

Reading body language is an important and natural part of communication. We come across so many articles teaching us to read another person like a book, to catch them while they are lying, or to figure out whether they secretly like us. I don't know how helpful these signals really are, other than in enabling our overthinking brains. 

1. Avoiding eye contact

2. Fidgeting

3. Continuity errors

Catch them red-handed.

But you read them wrong.

Turns out you are not quite an expert at reading body language.

Now your friendship is broken.