When you meet someone for the first time, it is polite to do a handshake.

Extend your right hand, grip the hand of whoever it is you are greeting, and wobble your arms around randomly.
Congratulations! You've done a handshake!

Usually, a strong handshake is seen as a good thing - but you can have too much of a good thing!

Jeremy Parsons, of Oregon, United States, discovered this when he shook hands with the giver of the strongest handshake - David Kenlowe!

Luckily, both men later saw the funny side!