@desperatebicycle looks like your fellow crashee was going pretty quick, but why were you on the right hand side of the path?
I wasn’t aware of any etiquette when riding a bicycle on a “no cycling” footpath through a park. I’ve been that way thousands of times and crashed once. It was just one of those things. But you are a better cyclist than me, obvs.
Update, just picked this up from eBay, eighteen miles away and £75. One dent on a pedal from a storage mishap but otherwise looks like new. Still has the shop tag sticker on the front brake cable so can’t have seen any rain ever.