Female trauma’s been given a serious workout in cinema, liberally exercised in the fantasy genre of late. The celebrated “Promising Young Woman,” while dark satire, uses hot pink revenge fantasy to acerbically explore unresolved trauma (its we live in a society bias nicely unpacked here), and fellow Sundance film, “The Blazing World,” attempts to fall down the rabbit hole of make-believe and similar flight-or-flight responses to emotional scars, only to grotesquely exploit it with its awkward tumble. Meanwhile, Karen Cinorre’s Sundance directorial debut, “Mayday,” a euphoric, escapist fantasy, meditates on many of the same retreat and reprisal notions, but thankfully, unpacks them with much more lowkey nuance, longing, and dreamy, emotional resonance.