I was walking through a meadow very slowly yesterday morning, looking at wildflowers and enjoying the sudden appearance of butterflies and moths as my feet disturbed the grass, when I saw a small clump of some sort of eggs. Upon closer inspection I could see that it was a group of baby yellow spiders! As I was taking a macro picture of them my camera must have touched the web that they were attached to, for instantly they sprung apart, as if the slight touch had triggered their reaction.
I googled the words, "baby yellow spiders" and found several photos similar to mine. On one site, The British Arachnological Society answers the question, "What are those bundles of tiny yellow spiders with a black spot?", and it describes very well the same sort of instant dispersal of the baby spiders that I had seen when I had touched the web with my camera lens.