Bands come and go; Butthole Surfers rarities are forever. This one is especially mysterious.

The April 1987 issue of SPIN gave it one sentence, in between items about the Fat Boys’ upcoming feature film Disorderlies and Bob Stinson’s recent firing from the Replacements:

Sandra Bernhardt [sic] has teamed with pals the Butthole Surfers to desecrate Heart’s “Barracuda.”

Not much, but it’s more than you would have learned from the Buttholes’ interview with Blatch, which ended like this:

I saw Sandra Bernhardt [sic] on David Letterman and she said she hung out with you g—(Tape Ends)

Though it’s possible the Butthole Surfers biography that came out last year has more details about the Bernhard-Buttholes relationship, above are the scant facts in my possession touching on this 30-year-old event. Since then, Bernhard has covered Heart’s “Alone” (with Winger!) and spoken of her love for the Wilson sisters. She apparently recorded two versions of the vocal to the Buttholes’ “Barracuda,” one in English and one in Spanish. If either has ever surfaced on a bootleg, it’s news to me.

This August, however, DM friend Brian Turner played pristine audio of the Spanish version of “Barracuda” on his WFMU show. Listen to it here. Toward the end of the Late Night clip below, Sandra Bernhard tells David Letterman about hanging out with the Butthole Surfers in Texas, as reported in Blatch #14.