John Irving remembers his time in Iowa, in the collection Trying to Save Piggy Sneed:
Andre Dubus and James Crumley were also students at the Writers’ Workshop then. I remember a picnic at Vance Bourjaily’s farm, where a friendly pie-fight ensued; Dubus or Crumley, bare-chested and reasonably hairy, was struck in the chest by a Boston cream pie. Who threw the pie, and why, escapes my ever-failing memory–I swear I didn’t do it.
Irving, John. Trying to Save Piggy Sneed. Garp Enterprises Ltd. (1996).