I discovered I had an underground yellowjackets nest while mowing my backyard and got stung a couple of times. With as many as I saw flying around, I wasn't about to try to get rid of them myself. I called J&J and Lance came out a couple days later, found both entry/exit holes and treated them. He advised me to keep an eye on it for a few days and to call him if I saw any still flying around. Lance was very kind and professional.