I found a freaking huge one in my laundry room about 10 years ago.
It was big; bigger than any I'd ever run into before.
So I figured I'd actually save this one and throw it outside instead of just killing it like I normally do. I grab a piece of paper and a big cup and move to put the cup over the spider (and then I'd slide the paper underneath and carry it outside).
Things didn't quite work out that way. When I got close, the spider appeared to explode -- turns out it was a momma spider that was carrying hundreds and hundreds of its young and they scattered in every direction all over the floor. So now I had a big spider and 500 tiny spiders running everywhere on the floor to deal with. Disgusting!
I ended up taking newspaper and throwing it over the baby spiders and walking all over them to crush them. That was one of the most disturbing things I've ever done. Blech!