The Good Ethnic Boy had a fairly useless housemate when he was in uni - he and his friend had to teach Housemate how to do pretty well everything, including introducing him to the concept of rinsing the soap out of his clothes once he'd washed them.
Well, one day Housemate mentioned that he'd seen a spider with a huge egg sac in his room, and the GEB and friend told him he needed to evict mama spider and her brood before they hatched.
You can probably tell where this is going. Housemate did no such thing, and a few days later the GEB walked out of his room to find the hall ceiling covered with thousands of leetle black spiderlings setting out to find their niche in the world. Now, I like
spiders, and I wouldn't like to see that.
The GEB emphatically does not
like spiders. He informed Housemate that he had better deal with the situation while everyone else was at class, or the GEB would be considering the merits of home-made flamethrowers.
Housemate's idea of 'dealing with it' was to spray most of a can of bug spray over the ceiling, then shut himself in his room. This did in fact take care of the spiderlings... to a point... because when they died, they all let go of their grip on the ceiling, and demonstrated that they were all starting to spin weblines. Sooooo the GEB and friend came home and cautiously opened the front door to discover thousands of little spiders festooning the hallway, dangling between face- and knee-height.
Housemate was summoned to finish
dealing with his arachnid mess, and reportedly spent about two hours sucking them all up with the vacuum cleaner, one. by. one.