Knock knock. Who's there? Orange

who? You know what, I just realized I forgot the rest of the joke. Can I get back to you?

Knock knock. Who's there? Brush

Brush who? Brush-ing aside the formalities, can I come in?

Knock knock. Who's there? Pane

Pane who? I'm having a glass-half-empty relationship with you, it's a window of opportunity to change.

Knock knock. Who's there? Isadore.

Isadore who? Isadore a lock on this door, or is it just glued shut?