^ 
^^ 
When paying for a taxi, don’t look at your wallet as you take out a note. Just grab one out at random and hand it over. It will always be the exact fare.
If you decide to start dancing in the street, everyone you bump into will know all the steps.
One man shooting at 20 men has a better chance of killing them all than 20 men firing at once (this is known as Stallone’s Law).
If you are heavily outnumbered in a fight involving martial arts, your opponents will wait patiently to attack you one by one by dancing around you in a threatening manner until you have defeated their predecessor.