Heh, we always just called it "Spencer's." They had those "pin head" things, but I think the Sharper Image store did too. Also called "bed of nails." Since you bring up Spencer's, that reminded me of a really dumb/awkward middle school story. When I was twelve or thirteen, I saw a torpedo vibrator on the shelves. Maybe a year prior, my best friend and I had stumbled upon his older sister's vibrator while their mom was in the room which got her into huge trouble. It took a while asking around at school to figure it out, and people associated me and the sister for a long time because of the questions I was asking. It was kind of a big deal at school, but I found out what I needed to know about that motorized cigar tube.
So I saw a vibrator at Spencer's and laughed like a schoolgirl (think seventh grade here) and the store was in the mall and was tiny and had like two stand-alone shelves and then the stuff on the wall, just chock full of cheap '90s Chinese garbage like the pin head thing, glow in the dark lightbulbs, and a vibrator in a cardboard box with a window. I was in view of the cashier when I saw it, she was just standing there kind of bored, and was trying to hold back a laugh, and she said, "You can take it out of the box, just be careful!" trying to break the awkwardness. So I did and she watched, and whatever held back laughter she had was turning into something else--I don't really know what--but she was bursting at the seams with something as I opened up the box and then unscrewed the little black thing on the "butt end of the vibrator." Being the dork I was back then, I had a flashlight in my cargo shorts, I took the batteries out, and put them into the vibrator, and I turned the thing on max. It sounded just like an electric razor.
By this point, there were a few people gathered in the walkway outside the Spencer's who took notice and started to point and laugh. The cashier couldn't hold it in, and she let out this vocal belch of "bbbbbbblllluuuhhhllllWAWAHAHAHAwwwwaaallHAHAHAHA" and laughed so hard it sounded like she was screaming which got A LOT of people's attention.
A security guy ran up and grabbed me because the cashier would not quit bellowing, and she finally got out a few words, "It's OK" and continued laughing. I went from a cavalier "hey, why don't I just stick batteries in this thing, I have nothing better to do?" to feeling pretty awkward, and I quickly boxed the thing back up without realizing it was still vibrating. People were staring, I was now petrified, and realized what I had just done. The cashier never stopped laughing and told me I had earned it or something like that and to take it and get out of her store and not to come back.
Not knowing what to do, I did just that, walked through the mall trying to hide a boxed torpedo vibrator under my shirt which didn't get as much attention as I would have thought, and made a mad dash once I was outside. That vibrator got a lot of use in a lot of pranks, and the last time anyone saw it was when I put it in my European history teacher's purse mid-way through high school.