What are some brain busters?

Answer:
A cowboy comes to a city on friday, he stays for 3 days, and leaves on friday. How is this possible ? The answer to this brainbuster is: His horse's name is friday.
First answer by Sillykitten98. Last edit by RainbowBlues. Contributor trust: 71 [recommend contributor recommended]. Question popularity: 2 [recommend question].