Mr. Larivière, who festooned the rock with a giant bow and sprayed it with
fluorescent orange birthday greetings, played coy in a number of interviews,
saying the boulder was simply a gift for his ex.
“She never had a rock big enough for her tastes, now she has one,” Mr. Larivière
said. He became something of a celebrity Monday as many media outlets treated
the act as a gag.
