I am allergic to Bees. Yellow jackets have put me in the hospital twice. The last time included a fairly scary ambulance ride. One of the four stings I received that time was on the top of my head and my face was so swollen that my wife didn't recognize me when she got to the hospital. I have learned to approach areas that look "Beeyee" with caution.
The most scared I have been because of bees though is when my 2 yr old son, who was allergic to milk, soy, wheat, peanuts, (pretty much everything you can think of) when he was young, stepped on a yellow jacket nest while with his grandmother. He was stung 13 times, knowing my bee allergy and all of his allergies, they rushed him to the hospital and called me and my wife who were over 1 hour away. That was the scariest 1 hour drive I have ever made. Luckily, the only thing my son wasn't allergic to at the time was bees.
It was a huge relief and a little humorous when we got to the hospital waiting room to find him running around trying to step on a fly and yelling "bad bees" while wearing nothing but his diaper. He has since grown out of all of his other allergies and is a healthy 5 year old.