“The thing is, when you are on it, you’re eight foot up, and I basically was on grass, no-one around, and I think this is what happened – I didn’t see the divot, my front wheel went into it and I went over the handlebars and landed on my head, crowd gathered. Luckily I have got spare glasses.”
Article source: https://www.huffingtonpost.co.uk/entry/jeremy-vine-penny-farthing-fall-accident_uk_620d06c1e4b01251308549b6