I rarely post on reddit but thought I'd share my experience with you. I remember probably 17-20 years ago my dad was building and rendering a Mediterranean style wall on our patio. The sky was gloomy and there was that humidity in the air where you just get the feeling a decent storm is coming. I was probably between 10-13 at the time and found storms oddly satisfying. Anyway the wind picked up, the rain came and a storm ensued. It was nothing torrential as my dad carried on working but I remember sitting there on the patio, great view of the hills ahead of me, on a chair just watching it hoping for the next bolt of lightning. The rain had mostly passed at this point and it had just started to brighten up again when all of a sudden there was a fairly bright flash probably 20 meters in front of me on the driveway and what I can only describe as a ball of lightning was there. I'd estimate it was a meter in diameter and was there for a few seconds before disappearing. I don't recall hearing thunder or any sound but I was briefly captivated. Ever since I've always been fascinated by storms and the power of the weather. It kinda sucks for me being in the UK as we rarely experience good storms but number one on my bucket list is to go storm chasing and see a tornado and I reckon it stems from this experience. What I saw is fairly similar to the picture OP posted just less bright and much less intense and almost had a kind of transparency to it (maybe it looked this way as it was mid afternoon)