Many many moons ago when I first started working as a truancy officer, I had to make a visit to an address - as was my job!
Anyhow, I arrived at the address, knocked on the door and when the door was opened and I'd introduced myself, the lady pretty much pulled me into the house, into the living room and shut the door behind me really quickly 
It was really quite warm in the house, almost stifling but I got down to the business of why I was there etc.
The lady was only half listening to me I could tell, and when I asked her if she was ok, she said "yes, fine, but the spiders are out and I'm checking they didn't escape when I came to the door"
Cue an immediate uplifting of my legs off the floor and a breaking into an immediate sweat 
So I'm sitting in my suit with my legs out ramrod straight in front of me wondering what the hell to do 
I asked if she could put them away and she just laughed and said they'd go back when they were ready and they wouldn't hurt me, but could I refrain from sudden movements as I might scare them!
I MIGHT SCARE THEM 
Then I saw one, a tarantula just pottering around on the floor around the back of the tv 
I asked how many there were, and she told me only 2. ONLY TWO OF THESE BUGGERS.
One of them was a good 8-10 ft away, but I had no idea about the other one. It was behind the sofa I was sitting on
. I HEARD it walking across the laminate and even now I shudder at the thought.
It was one of the quickest home visits I've ever done, and when I got out of the house I ran, actually ran, up the path and to my car. It's the only house I've refused to go back to ever 
My boss was very understanding but bloody hell it was horrible 
In fairness, they didn't approach me, thank god - but I was soaked with sweat when I left that house 