I followed a link here from Buzzfeed, but I had a feeling I knew what it was before I even read your description. This has happened to me, and it wasn’t even anywhere exotic; it was in Illinois. Here is a dramatic reenactment for your pleasure:

I arrive home at dusk and the evening newspaper is waiting in front of my door, as usual. (Yes, Champaign-Urbana has one of the rare evening papers left in the U.S.)

There is a dark shape on the rolled-up paper. As I approach I determine that it is a spider. The abdomen does appear rather larger than your standard Illinois spider, but as it’s close to dark out I still don’t notice anything else unusual.

I pick up the paper and attempt to shake the spider off outside at the same time I unlock and open the door. The spider lands just *inside* the door instead, so I take a swat at it with the newspaper.

*BABIES EVERYWHERE*

Me: AHHHH. *smack* AHHHH. *SMACK* AHHHHHHHHHHHH.

Babies still swarming, and many have now retreated deep into the carpet.

Me: *calm down, breathe, think….* VACUUM CLEANER!!!!!!!!

(And yes, I took the bag out right away. I usually don’t mind spiders at all, but this one got the adrenaline going for sure.)