So what makes a honey bee sting so effective? I love this simple animated graphic that demonstrates what happens.
One thing this image doesn't show, though, is how quickly venom is pumped. Bee Culture ran an article back in June that recommends getting the stinger out as quickly as possible by any means necessary. According to the article's author, "Studies have shown that leaving the stinger in just eight seconds can increase the size of a bee welt by 30%. It doesn’t really matter how you remove the sting; just flick it off as fast as possible."
That there is some good advice.