I'd just bought my EF24 for my trusty old 630 and was down at the beach with also my first roll of FP4plus. Some fella's dog seemed really keen to greet my girlfriend and I just took a few shots not expecting much exposure was 1/20th or the like (camera on Av @ f2.8 to get as much light as possible)
I just lucked in on getting the fabric fluttering the right way to have some clarity