Patrick James McMahon of Southampton, 25, was using his cellphone Sunday night when his 2000 Ford Mustang hit a sharp curve where Gingerbread Lane becomes Toilsome Lane and left the road, according to an East Hampton Village officer who was at the tricky intersection. Mr. McMahon later failed roadside sobriety tests and was taken to Cedar Street headquarters, where he was charged with aggravated drunken driving after a breath test produced a reported reading of .24, three times the level that defines intoxication.Mr. McMahon, who has no prior record of driving while intoxicated, was released the next morning without bail.Another challenging turn, this one in Sag Harbor at the fork of Long Island Avenue and Glover Street, was the scene of a crash on Saturday night. The driver, John P. Mazzara, 43, told police he was “driving home from Baron’s Cove and didn’t make the turn.” His 2013 Toyota hopped the curve and crashed into a tree.Ms. Mazzara refused to take a breath test, both at the scene and at headquarters, leading to the automatic suspension of his license for the next year. He was arraigned in the morning and freed without bail.East Hampton Town police made two D.W.I. arrests in Montauk Sunday night within 20 minutes and about 100 yards of each other.Brian J. Priest of Montauk and Florida, 28, was speeding, police said, when they stopped his 2009 Chevrolet pickup on Flamingo Avenue north of West Lake Drive. “I just had two Budweisers at Liar’s,” he told the arresting officer. His breath test at headquarters reportedly produced a reading of .11, and he was held for a morning arraignment before being freed on $250 bail.Shortly after, police stopped a 2016 Hyundai sedan on West Lake Drive near Flamingo, saying the car was swerving across the divider, and wound up charging Dardan Hoti, 34, of Sunnyside, who told the arresting officer he had had dinner at Swallow East with one glass of wine. His breath test read .13, police said. He was freed on $500 bail the next morning.Last Thursday night, an East Hampton woman was charged with both D.W.I. and possession of a controlled substance. Town police stopped Sara J. Byrnes, 61, on Town Lane, saying her 1995 Ford was moving erratically, and said she failed the roadside sobriety tests. Back at headquarters, they reported her blood-alcohol level to be .11.As police were processing her, they said they came across seven round blue pills, which were determined to be oxycodone. According to the charge, Ms. Byrnes did not have a prescription for it. She was released without bail.Kenneth W. Kalbacher, 57, was charged with D.W.I. a little after midnight Saturday. Town police stopped his 2005 Honda on Cove Hollow Road in East Hampton, saying the car had been swerving into the oncoming lane before making an “unsafe turn” into his own driveway, striking a mailbox.His breath test number was .11, but police noted that the reading was obtained despite Mr. Kalbacher’s having given an insufficient breath sample. He was released Sunday morning without bail, but with a date on East Hampton Town Justice Court’s criminal calendar.All of the week’s D.W.I. charges were classified as misdemeanors.