Moderator: Your word TBS, is "necessary."
TBS: Necessary... (furrows brow)... can I have a definition?
Moderator: So important that you must do it or have it : absolutely needed.
TBS: Necessary... (draws imaginary letters on placard)... can you use it in a sentence?
Moderator: It is necessary to spell words correctly for television graphics.
TBS: Necessary... (deeply sighs)... N... G... E... (struggling mightily)... G... uhh... U, U, C, T, Y? Necessary?
[Pic via timtrunzo]
My wife is an editor of a newspaper and a lot of times they initially lay out their graphics with "filler" in the area's were text and headlines will eventually go. I can only assume TBS did the same thing and just forgot to correct this.
My first thought was that someone's keyboard got set to Dvorak and they didn't notice. This would certainly explain the s -> u; I don't know Dvorak well enough to be sure about the other letters.