This expression had nothing to do with St. Ignatius of Loyola. But "cannon blasts" became a little inside joke for Pier Giorgio and his friends. This carried over decades later to his beatification in 1990 when chants of "Boom! Boom!" could be heard coming from the young people in attendance on the piazza of the Basilica of St. Peter."Cordial greetings and terroristic cannon blasts: boom! boom! boom! from Pier Giorgio Frassati"