Have you ever experienced any infestations/problems with insects?

[TDAS04]

What are some unpleasant experiences that you remember where you had to deal with numerous bugs?  It could have been an infestation or an unusually large population of a certain species in your area, several creatures causing problems in your own home, etc.

When I was in high school, an estimated 6,000 bees settled down in the basement wall, and an exterminator was definitely needed.  I'm pretty sure that there is lots of honey in the wall.

Living a climate with cold winters means that my region doesn't experience that many problems with various creatures, at least compared to places like Florida.  However, depending on the year, there may be so many grasshoppers (my area is prairie), that you can't walk through tall grass without them hopping, flying, and buzzing everywhere. 

What are some problematic experiences with insects you've had?  They don't necessarily have to be about insects.  If you've had similar moments dealing with snakes or rats or other creatures, you can talk about that too.