Mary
I had to do a 700' spin recovery in a K13 when returning to gliding after a break of around 20 years. I believe that I pulled out of the recovery dive at around 450' - the ground looked very close. I used to regularly spin the old Swallow at Southdown Gliding Club - once did about six sucsessive spins down from 7000'. I'm happy with spinning.
But I'm not an instructor and the guy in the K13 doing my check flight (not at Southdown, but an an inferior club some miles north) hadn't flown with me before and I think that he took a stupid risk. Don't know what he was trying to prove! .