E umas aulinhas de ginástica cerebral, não??

Hoje quando entrei no balneário do ginásio, estavam duas pitas, para aí de 13, 14 anos à conversa. Quando entrei estava uma a dizer:
-And so he went around the block.
10 segundos de silêncio até que a outra diz:
-Oh...I get it! He went around the block, ahahahahahahah
Nessa altura percebi que era uma piada, mas já a tinha perdido! Logo a seguir diz a que não tinha percebido a piada:
-I know one! Do you know that american actress that was stabbed?? Reese....
-Witherspoon?
-No, she was stabbed with a knife!
-No, her name, Witherspoon
-No, she was stabbed with a knife!
-No, I was saying her name, Witherspoon
-I know, but that's the joke, you say WITHerSPOON, and I say, not with a spoon, she was stabbed with a knife!!
-But....
Nessa altura eu saí, mas elas ainda lá devem estar a tentar perceber e explicar a piada!!!