Quirky people in the horsey community ?

My grandmother is very quirky. She's 91 and has recently taken a 21 year old 14h Arab on loan; the horse was gelded at the age of 18 after a long and happy career, to embark on a new career as a pony club pony. Unable to find a teenager who could handle him, he ended up with my mad Granny. Granny claims she's been riding for 90 years, is deaf as a doorpost, mildly forgetful, and utterly fearless - but not as sharp on her feet as she used to be. She mounts her horse from a step ladder and he's good as gold on the ground but an utter lunatic when ridden. She leads my children on their little ponies from Phoenix the Arab and bellows instructions at the children at all times. She always said she'd keep riding for as long as her horse stayed sound; the old horse came up lame through the winter and had to be retired, at which point Granny bellowed that I needed to find her another because she wasn't ready to be retired yet. (She only stopped skiing a couple of years ago...)