This one goes out to a21985. It's a 3-minute video of a Welsh honey named Sarah Nicola Randall jumping on a trampoline. Those giant jugs come out briefly for air at 0:40 and for good at 0:55. That pesky mesh top comes off completely at 2:00. Enjoy!
According to her boobpedia article boobpedia.com:
Personal Also known as: Sarah Randall Born: May 20, 1988 (age 28) Wales
Years active: 2011- Ethnicity: Caucasian Nationality: British, Welsh Body Measurements: 32HH-24-34 Bra/cup size: 32I (70I) (same as HH cup) Boobs: Natural
Height: 5 ft 3 in (1.60 m) Body type: Curvy Eye color: Hazel Hair: Brown
This 3-minute bonus video should persuade the doubting Thomases of Sarah's all-natural goodness:
Trigger warning to lovers of tiny titties: This chick has, as MrSkin would say, jamambo jugs that do a whole lot of bouncing and jiggling :)

Bra sizes have gone the way of dress sizes. My wife was/is a 34 DD but last time she bought bras they put her into a 34G. She hasn't grown at all but the industry is f'ed up.