You know you're in for something interesting when a letter begins "let me preface this by saying … I have never been diagnosed with any psychotic disorder."
With the last-ever episode of Breaking Bad due to appear on European screens this Monday, Walter White and Jessie Pinkman – or Bryan Cranston and Aaron Paul – have been doing the interview circuit.
And Cranston, being the genius he is, decided to bring along an example of just how, er, dedicated fans of the show are.
Easy to forget that Cranston has a comedic streak and played Hal in Malcolm in the Middle, but we reckon he'll always be Heisenberg.