CANNES, France (AP) — “A good electric chair” is how Jane Schoenbrun describes their first Cannes Film Festival premiere. “I really felt like my body was in a state of convulsion,” says Schoenbrun. The day after the premiere of “Teenage Sex and Death at Camp Miasma,” a bold, bloody queer slasher film starring Hannah Einbinder and Gillian Anderson , Schoenbrun and their co-stars were still buzzing from the ecstatic response. The movie, one of the most prominent American films in Cannes this year,