I can remember all too clearly the first day we had precious GD in our care, we live 200 miles away so she was 4 before this happened.
We took her to the beach at Filey - a mix of sand and stone. We were walking along the concrete path to the Brig, when it became seaweedy and slimy. I immediately started to say 'I think its time to turn back now the path is getting slippy', (I was worried for myself as well as her) when she went base over apex and grazed her knee and had a nasty scrape down her leg. We returned her to her parents cringing and apologetic, as they are, at times, a bit over fussy (or seem so to us), but they were very relaxed about it and we were allowed to have her again the next day. We headed inland then to somewhere less hazardous!