Hello the nest could have been under the leaf it would be a hole no bigger than an inch across,I I strimmed the top of a wasps nest and accidentally stood in it last year ,I had my trousers stuck in my socks the little blighters found a split in the leg seam,I had to take my trousers off to get them out ,they stung me ,my anti histamine was 1/4 mile away in my van jezza