I have 2 girls (3 in May and 2 in July) who must have the most horrific smelling poop in the world.  We put all of our garbage in the kitchen can, which has a domed, swinging lid.  So imagine this: two girls with two awful poopy diapers before bed, and one lazy mommy who doesn't want to take the garbage to the outside can.  Then comes morning - of course one lazy (not to mention half asleep) mommy has forgotten about the two awful poopy diapers before bed, and swings that lid open for a banana peel or a yogurt container and...BAM!, lazy, sleepy, and now concussion laden mommy falls in the floor coughing and gagging and covering her eyes because of the incredible stinging sensation.  Well, not quite that dramatic, but, I bet you all have been there!
