Mowing the grass and yellow-jackets

Shortly after I began mowing the grass tonight, I felt a shocking sensation in my legs. At first I didn’t think much of it, until the pain became more intense. Upon looking down, I noticed 6-8 yellow-jackets on my legs. After swatting them off, I ran inside to get away. When I got inside I felt similar pain on my back and neck. I found two more yellow-jackets on my back and managed to swat them away.

I’m going to postpone mowing for a day or two. I still have minor pain and local swelling which should be better within a few hours.

A yellow-jacket that didn’t survive:
this yellow jacket didn't get away. on TwitPic