This happened last summer:

Sue has a yellow jacket nest in the door frame of her garage.
How do I know this? Well, let me tell you the story.
This is how it goes:
*Angie walks to garage side door to unlock and help get band gear ready for practice tonight. Sue follows. And the dialog unfolds.*
Me: Man, there are a lot of flies here near the garbage cans...wait! Close the door!
Sue: What? *Sue tries to walk past Angie to open the door, Angie blocks her way.*
Me: Just trust me!! Those aren't flies! *Angie, fumbling to get large garage door open*
Sue: they're just flies! *makes you're-such-a-wuss face at Angie*
Me: Do NOT open that side door! *frantically opens garage door and leaves a dust-cloud in the shape of Angie as she runs away.*
Sue: What? *walks around to side door*
Sue: Wait...ouch, ouch! Ouch! OUCH!!
...
Me: I tried to tell you.

The End.