Knock Knock Who's there . 9/11. 9/11 who . I thought you'd never forget
I'm not sure if you meant it as joke or making fun of the victims of this tragedy; is that what you're meaning?
Yep, I thought it would be funny.
I do not think that this is something that we should joke about. Have you watched the movie about 9/11? It was terrifying for everyone involved, I am sure you would want to take it back after seeing that movie.