Good morning. I'm Renée Montagne. Former President George H. W. Bush says when he turns 90 he'll celebrate by skydiving. Thrill seeking at 90 is becoming a trend. Thelma Gratch spent her 90th, presumably with arms raised, hurtling down a 230-foot high roller coaster at 80 miles an hour. She's had a season pass to an amusement park outside Cincinnati since 1979 so chances are she's spent other birthdays screaming her head off. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.